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329 results about "Test procedures" patented technology

Test procedures facilitate thorough software testing by allowing individual modules or arbitrary groups of modules to be thoroughly tested outside the environment in which they will eventually reside. Test procedures are complete, self-contained, self-validating and execute automatically.

System and method for planning and executing test of electronic device

A method for planning and executing a test of a DUT includes receiving a test description from a user via a GUI, where the test description identifies the DUT and an objective of the test; composing a prompt for querying a large language model (LLM) based on the test description, where LLM includes a trained machine learning algorithm; sending the prompt to the LLM via an API; determining, using the LLM, a test plan for executing the test to be performed in response to the prompt to achieve the objective of the test based on the test description and general testing information, where the test plan identifies a type of test, test instruments for performing the test, a test procedure using the instrument, and parameters of the DUT to be measured according to the test procedure; providing, via the GUI, the test plan to the user for testing the DUT.
Owner:KEYSIGHT TECHNOLOGIES INC

Display assembly using air characteristic data to verify display assembly operating conditions, systems and methods for the same

Display assemblies utilizing air characteristic data to verify internal operating conditions and related systems and methods are disclosed. The display assembly includes a side assembly, including an electronic display, is connected to a structural framework. Sensor(s) are provided, at least one of which is located at, or fluidly connected to, a closed airflow pathway. A controller receives data from the sensor(s) and determines whether an initial indication of an operating condition exists. If so, a testing routine is initiated, additional data is received from the sensor(s) during and / or thereafter. The controller confirms whether the operating condition exists based on the additional data.
Owner:MANUFACTURING RESOURCES INTERNATIONAL INC

Testing apparatus and method for operating the same

The present disclosure provides a testing apparatus, which includes a plurality of devices under test (DUTs) and an advanced process control monitor (APCM). The APCM includes a switch circuit, a control circuit, a detection circuit, and an auxiliary control circuit. The switch circuit includes a plurality of switch devices corresponding to the DUTs. The control circuit includes a plurality of control devices corresponding to the switch devices, and is configured to sequentially activate one of the switch devices during a test procedure of the testing apparatus. The detection circuit is configured to provide a first power supply voltage to a first terminal of each switch device. The auxiliary control circuit is configured to provide a second power supply voltage to a second terminal of each switch device deactivated the control circuit.
Owner:TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

Test apparatus, test method and program

A test apparatus includes circuitry configured to acquire log information according to a first user operation; generate, for each screen of a target page of a software test, a page object defining one or more methods, based on the log information, each of the methods indicating a test procedure and a second user operation for an operation target that is to be performed on the screen of the target page; generate, based on the methods defined by the page object, a manual of the software test, the manual including (i) operation content information indicating a content of the second user operation, (ii) the test procedure, and (iii) an image indicating the screen of the target page, the image being used for identifying the operation target as the second user operation; and output data of the manual.
Owner:NIPPON TELEGRAPH & TELEPHONE CORP

Fuel cell system operating condition detection method, automatic test method, and test system

PCT designated stageWO2025190417A1Fuel cellsFuel cellsControl engineering
Disclosed in the present invention are a fuel cell system operating condition detection method, an automatic test method, and a test system. The fuel cell system operating condition detection method comprises: firstly, on the basis of main operating conditions of a fuel cell system, selecting a current, a hydrogen inlet pressure, an air inlet pressure, a coolant inlet temperature and a coolant outlet temperature as determination references for operating condition detection; then, performing interpolation on the basis of the current value of the current, so as to acquire control target values of the remaining parameters; and finally, determining a system state on the basis of signal features of the current combined with whether the remaining parameters are within threshold ranges of the control target values, so as to complete operating condition identification. The method is applicable to a fuel cell test system, and has the advantages of facilitating calculation, requiring no training, allowing online operation, involving an automatic test sequence, etc. An automatic test procedure can also avoid the problem of the next group of new test conditions being automatically triggered due to latency-induced erroneous determination during operating condition detection, thereby improving the stability and reliability of the system.
Owner:SHANGHAI XCMG INTELLIGENT TECH CO LTD +1

Managing untraining of inference models with respect to portions of training data

Methods and systems for providing computer-implemented services using inference models are disclosed. To provide the computer-implemented services, a prototype inference model may be untrained with respect to a portion of training data that has sensitive and / or poisoned information content. To do so, a first partial untraining procedure may be performed to obtain a partially untrained prototype inference model. A testing procedure may be performed using a trusted inference model to determine whether the partially untrained prototype inference model has been sufficiently untrained with respect to the portion of training data and is sufficiently trained with respect to other training data that has an information content that is to be retained. If these conditions are met, the partially untrained prototype inference model may be promoted to a production ready inference model and used to provide the computer-implemented services.
Owner:DELL PROD LP

Test method and system for dynamic configuration and verification of GPP (General Purpose Protocol) of eMMC (Embedded Multi Media Card) memory

The invention discloses a test method and system for dynamic configuration and verification of a GPP of an eMMC memory, and relates to the technical field of embedded memorizers, and the method comprises the following steps: S1, the test system obtains a test parameter set through external input or from a predefined test case library, S2, after the input test set is processed through a dynamic parameterization engine DPCE, the test parameter set is stored in the test case library; the test system analyzes the configuration data to obtain analysis parameters, and to-be-written configuration data is formed; s3, before a configuration command is sent, dynamically constructing an eMMC partition layout model, and executing a conflict detection algorithm; s4, the test system writes the configuration data to be written after conflict detection into the eMMC; s5, adopting a triple persistence verification ring mechanism to form closed-loop verification with configuration taking effect; and S6, outputting a detailed test report by the test system based on the judgment node in the test process. According to the method, the test efficiency is remarkably improved, the test coverage rate and the product quality are enhanced, and more flexible and comprehensive test case design is supported.
Owner:JIANGSU XINSHENG INTELLIGENT TECH CO LTD

Cognitive disorder screening system, electronic equipment and storage medium

The invention provides a cognitive impairment screening system. A cognitive impairment screening system comprises an eye movement tracker, a testing end device, a tested end device and a processing device. The testing end device responds to the configuration operation of the testee and generates a test process of the subject, and the test process comprises test tasks corresponding to the cognitive competence of at least one dimension; the tested end device is provided with a first display device, and the test content corresponding to each test task is sequentially and visually displayed through the first display device; the eye movement tracker collects eye movement data of the subject for each test task in the test process and transmits the eye movement data to the processing equipment; the processing device determines a cognitive screening index for the eye movement data, and generates a screening recommendation result according to the cognitive screening index; the cognitive screening index comprises at least one of the test result accuracy data of the test task and the fixation time ratio of the region of interest in the test task, so that the cognitive impairment screening efficiency and accuracy are improved.
Owner:SHANGHAI UNIV OF MEDICINE & HEALTH SCI

Method and device for automatically testing sensitivity of broadband radio frequency system and medium

The invention discloses a method, equipment and medium for automatically testing the sensitivity of a broadband radio frequency system, and relates to the technical field of broadband radio frequency testing, and the method comprises the steps: starting a testing process, and coordinating a plurality of calibration equipment and equipment to be tested in a wireless network in the same testing time slot, synchronously sampling spectrum data of each calibration device through an air interface and processing the spectrum data into a noise distribution parameter set; and dynamically adjusting the output power of the vector signal generator and synchronously monitoring the bit error rate change according to the received power predicted value until the difference value between the bit error rate and a preset target bit error rate threshold value meets a convergence condition, recording the received power value during convergence as a sensitivity test result, and generating a test report. By generating the high-precision dynamic noise map and calculating the compensation transmitting power calibration value, accurate sensing and active compensation of the space noise of the test environment can be realized.
Owner:CHENGDU ANPRI ELECTRONICS CO LTD

Systems and methods for hybrid integration and development pipelines

Systems and methods provide a HybridOps model for the identification, capture, isolation, feature engineering and adjudication of source signal data signatures for inclusion in calibration quality standard reference signal data signature libraries that improve machine learning and validation, reduces model bias and reduces model drift. The HybridOps model may include an “unlocked” AI / ML (machine learning enabled) public facing deployment pipeline in parallel with a clone AI / ML deployed in an internal development environment using a ML-Ops pipeline and in parallel with a clone“locked” AI / ML (machine learning disabled) as a standard reference. The three deployed models enables monitoring and measuring model drift, context drift and product progression for improved verification and validation of model reliability. The parallel environment AI / ML testing using randomized learning, validation, testing sets drawn from calibration quality adjudicated standard reference signal data signature libraries provides for validation, verification and test to failure procedures.
Owner:COVID COUGH INC

Automobile sensor multi-station test method, device and medium

The invention discloses an automobile sensor multi-station test method and device and a medium, and relates to the technical field of automobile manufacturing testing, and the method comprises the steps: training a lightweight gradient boosting tree model through employing a historical test data set in combination with federal learning, obtaining a global optimization test model, and optimizing a test process through employing the global optimization test model, obtaining a parameter configuration adjustment amount and a test sequence priority, and collecting production resume data of the automobile sensor at the same time; the production resume data comprises production equipment data, process parameters, production process relationships and sensor batches; analyzing the production resume data by using a graph convolutional network to obtain production features, and fusing the parameter configuration adjustment amount, the test sequence priority and the production features to generate a self-adaptive test strategy; according to the method, the lightweight gradient boosting tree model is trained through preprocessing of the historical test data and federated learning, the global optimization test model is constructed, and the test efficiency and the resource utilization rate are improved.
Owner:INNOVALUES AUTO PRECISION SHANGHAI CO LTD

Permanent magnet frequency conversion submersible pump test method and system

The invention relates to the technical field of submersible pump testing, and discloses a permanent magnet variable frequency submersible pump testing method and system. The method comprises the following steps: acquiring an original response signal cluster of the submersible pump in multi-stage variable-speed operation by constructing an integrated test environment; decoupling and enhancing the signal cluster based on time sequence dependence, and separating out an independent hydraulic performance characteristic signal group and an independent electromagnetic vibration characteristic signal group; and inputting the characteristic signal group into a dynamic working condition simulator, and restoring an internal flow field pressure cloud picture and a rotor stress distribution picture of the submersible pump under the simulated working condition through an iterative approximation algorithm. The two are fused to deduce a potential failure mode and its evolution trajectory, and an enhanced test procedure is generated accordingly. According to the method, accurate separation of multi-physics field test signals and visualization of internal states are realized, and the accuracy of fault attribution and the advance of failure prediction are improved.
Owner:HENGYANG CHAOYANG MOTOR PUMP IND CO LTD

Information processing device, method, program and system

The purpose of this disclosure is to utilize generative AI to reduce the effort required to create test scripts. [Solution] A program for operating a computer having a processor and memory, the program causing the processor to execute the following steps: accepting specification of information related to a test from a user; reading WAI-ARIA roles and labels from a page expressed in HTML as summary information about the page on which the function to be tested is executed; creating a first prompt including information related to the test, summary information, and an instruction statement instructing the output of test procedure information; inputting the first prompt into a generation AI and causing the generation AI to output the test procedure information; and creating a test script based on the procedure information.
Owner:SHIFT CO LTD(JP)

Directional test case generation method based on large language model and symbolic execution tool

The invention belongs to the related technical field of software engineering, and particularly relates to a directional test case generation method based on a large language model and a symbolic execution tool, which comprises the following steps: generating a cue word p based on a to-be-tested program P and a test object code branch T, and generating a test case i through the large language model; using i to test P, and if T is covered, completing generation; otherwise, the code coverage information of the P in the current test is added to the current p in an accumulated mode, the test cases i are regenerated and tested, when the number of retimes reaches the preset retry upper limit m, T is still not covered, the m test cases i serve as input templates, the program literal quantity in each input template is modified into symbolization variables of the symbolization execution tool, and the program literal quantity in the input templates is changed into the symbolization variables of the symbolization execution tool. Constructing a test entry function f of the symbolic execution tool; and synchronously inputting f, P and T into a symbolic execution tool to generate a corresponding test case j, and testing P to complete the generation of the test case. According to the invention, the software test coverage rate can be improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Vortex flowmeter testing apparatus and method

The application discloses a vortex flowmeter testing device and method, which is suitable for PCBA testing and comprises the following steps: receiving a starting instruction to execute a starting self-check and completing test variable initialization according to parameter configuration; maintaining a timing thread; the timing thread refreshes a timing queue through a preset time, and determines whether timing time is reached by comparing the timing time conversion times of threads in the queue, and then executes operation as required to meet the timing requirements of each test thread; and maintaining a receiving data processing thread; the receiving data processing thread receives all serial port information and processes the serial port information; after initialization is completed, test actions are executed according to test commands. Through the application, the purposes of simultaneously testing multiple vortex flowmeters and multiple test procedures can be achieved; on the other hand, system resource consumption can be greatly reduced, and the probability of occurrence of lag and death is greatly reduced.
Owner:SHANGHAI FEEJOY ELECTRONICS TECH CO LTD

Radio frequency chip test experiment device

The utility model discloses a radio frequency chip test experiment device, and relates to the field of radio frequency chip test experiments. Comprising a first signal input end, a third change-over switch, a radio frequency transmitting chip circuit, a radio frequency transmitting end, a radio frequency receiving chip circuit, a radio frequency receiving end, a fourth change-over switch, a second output test end, a first change-over switch, a first digital source meter, a second change-over switch, a second digital source meter and a liquid crystal control circuit. The radio frequency chip test experimental device can optimize the test process, reduce the test time and labor cost, improve the test accuracy and reliability, accurately control the transmission and reception of test signals by using a digital source meter, and adopt an advanced signal processing algorithm, so that the test accuracy and reliability are improved, and the test efficiency is improved. According to the radio frequency chip testing device, the problem of signal interference during chip testing can be effectively reduced, multiple functions needed by radio frequency chip testing are integrated into one compact device through integrated design, and testing convenience and flexibility are remarkably improved.
Owner:BEIJING HERRENKNECHT TECH DEV CO LTD

Performance test method and device for multi-POE (Power Over Ethernet) network port equipment and readable storage medium

The invention discloses a performance test method and device for multi-POE (Power Over Ethernet) network port equipment and a readable storage medium. The method comprises the following steps: S1, establishing a test environment; S2, establishing communication connection between an upper computer and to-be-tested POE equipment; s3, issuing a communication parameter query instruction through the upper computer, obtaining communication negotiation parameters of each POE network port of the to-be-tested POE equipment, and judging whether the communication function of each POE network port is normal or not according to a preset communication standard; s4, a power supply parameter query instruction is issued through the upper computer, power supply parameters of all POE network ports of the POE equipment to be tested are obtained, output power is calculated, and whether the power supply function of all the POE network ports is normal or not is judged according to a preset power threshold; and S5, outputting a performance test result of each POE network port. The whole process is automatic, and cooperative control of multiple devices does not need to be manually intervened; and the test process can be terminated immediately when the test is abnormal, so that the test time of a single product is greatly shortened, and the test efficiency of batch production is improved.
Owner:YISHENG (WUHAN) TECH CO LTD

Method of determining testing parameters of a melt flow rate testing apparatus

The present invention provides a method of determining testing parameters of a melt flow rate testing apparatus, comprising the steps of: (i) providing a reference input indicative of a selection of a melt flow rate testing procedure from a predetermined list of melt flow rate testing procedures; (ii) providing a characteristic input indicative of a load mass and a testing temperature for melt flow rate testing; (iii) providing a sample input indicative of an estimated value of the melt flow rate of the sample; and (iv) determining at least one characteristic testing parameter for the melt flow rate testing apparatus, utilising a representative value generated from a predetermined combination of any one of said reference input, said characteristic input and said sample input.
Owner:ILLINOIS TOOL WORKS INC

Test system configuration adapter systems and methods

Presented embodiments facilitate efficient and effective flexible implementation of different types of testing procedures in a test system. In one embodiment, a test system configuration adapter includes a tester side socket, a break out pin, and a device under test side slot. The tester side socket is configured to couple with a test equipment socket. The break out pin is configured to couple with the supplemental equipment. The device under test side slot is configured to couple with the tester side socket, the break out pin, and a device under test, wherein the tester side socket. The test system configuration adapter is configured to enable communication between test equipment coupled to the test equipment socket and supplemental equipment coupled to the breakout pin while the device under test remains coupled to the device under test side slot. In one exemplary implementation, the breakout pin and tester side socket are selectively coupled to the device under test side slot. The test system configuration adapter can include a switch configured to switch a portion of the coupling of the device under test side slot to the tester side socket and the break out pin.
Owner:ADVANTEST CORP

Simulation test model training method and device

PendingCN121960093AImproving Simulation Test Efficiencyimprove accuracyDesign optimisation/simulationNuclear powerManual testing
The invention provides a training method and device of a simulation test model, and relates to the technical field of nuclear power simulation. The method comprises the following steps: acquiring historical test operation sequence information and historical test result information in a historical test procedure; acquiring feature information of the nuclear power plant simulation system; the historical test operation sequence information and the historical feature information are subjected to feature fusion and then input into a simulation test model, and first test result information is obtained; and training the simulation test model according to the historical test result information and the first test result information. Through training, the simulation test model learns to obtain the capability of predicting the test result corresponding to the test operation sequence information based on the characteristic information of the system, the method can adapt to different states of the nuclear power plant simulation system, and the test result is accurately predicted. The efficiency, accuracy and adaptability of simulation testing of the nuclear power plant simulation system are improved, the intelligent level of testing is improved, and therefore the workload of manual testing is reduced.
Owner:STATE POWER INVESTMENT CORPORATION RESEARCH INSTITUTE +1

Method, processing unit and recording system for generating encoded training data for a machine learning process

The invention is concerned with a method for generating encoded training data, wherein a processing unit performs the following steps for generating the encoded training data (11) and for storing them into a data storage during a test drive of a test vehicle that carries a camera that is generating raw image data. It is tested, if a given video encoder is suitable for encoding the raw image data for generating the encoded training data for a training of another, second artificial neural network, by performing a testing procedure.
Owner:ARGO AI GMBH +1

Device and method for checking an output with regard to its switch-off capability

A device and a method for checking the switchability of an output of a control unit are shown. The method comprises determining that a time has come to execute a test routine, opening a switch connecting a voltage or current source to the output for an initial period of time, measuring the voltage or current output during at least part of the initial period, closing the switch at the end of the initial period, comparing the voltage or current profile measured during the initial period with one or more predetermined criteria that serve as indicators of the switchability of the output, and, if one or more of the predetermined criteria are met, terminating the test routine.a continuation of the verification routine by opening the switch for a second period of time which is longer than the first period of time, a measurement of a voltage or current output during at least part of the second period of time, and a comparison of the voltage or current waveform measured during the second period of time with one or more predetermined criteria which serve as indicators for the switchability of the output.
Owner:WAGO VERW GMBH

Layout structure and test method of fast recovery diode

The invention relates to a layout structure of a fast recovery diode and a test method, the layout structure of the fast recovery diode comprises a wafer which comprises odd-numbered line areas and even-numbered line areas which are alternately distributed, each odd-numbered line area comprises a plurality of first areas which are sequentially arranged along the line direction, and each even-numbered line area comprises a plurality of second areas which are sequentially arranged along the line direction; each even-numbered line area comprises a plurality of second areas which are sequentially arranged in the line direction; the first recovery diode and the second recovery diode are located in the second area, the second recovery diode is located on one side of the first recovery diode in the row direction, the first recovery diode has a first current specification, and the second recovery diode has a second current specification; and a third recovery diode in the first region, the third recovery diode having a third current specification, the size of the third current specification being greater than the size of the first current specification and greater than the size of the second current specification. According to the layout structure, test programs can be reduced, the test times can be reduced, the probe card cost can be reduced, and the productivity can be improved.
Owner:GTA SEMICON CO LTD

A device for testing the load of a lubricating oil on a vehicle window regulator assembly

The application discloses a kind of automobile glass lifter assembly oiling load test device, it is related to automobile glass lifter assembly test technical field.The present application includes rack, the middle of the rack is provided with central quick interface, the top of rack is provided with test load, test load can exert load to glass support in automobile glass lifter assembly, the top of test load is provided with oiling mechanism, and oiling mechanism can be applied to sliding plate with lubricating oil;The inside of the rack is provided with ejection mechanism, and switching tool is installed on ejection mechanism.The present application adopts standardization main machine platform design, provides general power and measurement pedestal, and all measurement sensing and execution core are fixed to main machine, and are not affected by product model.Combining oiling procedure with test procedure, oiling mechanism does not need to be set in subsequent noise test shed, oiling and noise test are separated, reduce the influence of mechanism operation on noise, and cost is lower.
Owner:LONGKOU TAIJIN HYDRAULIC TECH +1

Electronic watch COB board chip packaging test frame

The utility model relates to the technical field of electronic watch production quality inspection equipment, and discloses an electronic watch COB board chip packaging test frame comprising a pedestal, the bottom end of the pedestal is symmetrically and fixedly connected with two support frames, the middle part of the top end of the pedestal is fixedly provided with a test mechanism, and two sides of the front part of the top end of the pedestal are respectively provided with a chute. The testing mechanism comprises a testing host fixedly installed at the top end of the base. According to the utility model, the modularized assembly structure design is adopted, the auxiliary assembly rack is arranged in cooperation with the test equipment, and the auxiliary assembly rack is provided with the front and rear rows of assembly grooves, so that the chip packaging of the electronic watch COB in the two rows of assembly grooves can be detected and tested in sequence, and when the chip packaging of one row of electronic watch COB is tested, the chip packaging of the other row of electronic watch COB is tested. According to the electronic watch COB chip package test device, the other row of detected electronic watch COB chip packages can be disassembled, the electronic watch COB chip packages to be tested are reassembled, the test process is simple, the test efficiency is high, and the requirement of large-scale production can be met.
Owner:SHENZHEN YIFAN ELECTRONICS CO LTD

Mastitis sensor

In one aspect the invention provides a portable hand held mastitis sensor with a testing chamber defining a receiving port, and a liquid reagent reservoir where a reagent delivery assembly is provided to deliver liquid reagent to the testing chamber. Also provides are a shuttle and a shuttle contact transducer engaged with the testing chamber opposite to the receiving port, as well as a shuttle position reset assembly, and an output indication assembly. Testing procedures are completed with the mastitis sensor by measuring the fall time of the shuttle through a testing chamber containing a mixture of milk and liquid reagent.
Owner:KORU INNOVATIONS LTD

Method for testing a connector assembly

Method for testing a connector assembly (10). The connector assembly (10) comprises a housing (12), at least two cables (14), at least two receptacles (16) in the housing (12) for receiving the at least two cables (14) in the housing (12), and a fixing means (26) arranged on each cable (14) for fixing the cable in the receptacle (16). The method comprises the following steps: • Inserting the two cables (14) into the housing (12) • Inserting a test object (18) between the two cables (14), wherein the test object (18) is arranged substantially perpendicular to the two cables (14). • Moving the test specimen (18) in a direction substantially perpendicular to the two cables (14), whereby the two cables (14) are pushed apart by this movement • Ending the testing process when a defined force or maximum distance is reached
Owner:CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH

Method and system of determining test procedures using large language models

A method and system of determining test procedures using large language models (LLMs) is disclosed. A processor receives a plurality of domain-based documents corresponding to a test product to be tested. One or more user requirements are determined corresponding to at least one feature of the test product from one of the plurality of domain-based documents. A plurality of domain-specific keywords is determined from the one or more user requirements. A contextual data is determined by extracting a portion of a text data from the plurality of domain-based documents. A knowledge dataset is determined by prompting a second LLM based on a second prompt and the contextual data. One or more test procedures for one or more test cases for testing the at least one feature of the test product by prompting a third LLM based on a third prompt and the knowledge dataset.
Owner:L&T TECH SERVICES LTD

Air tightness test tool

The utility model discloses an air tightness testing tool which comprises a working table formed by assembling a bottom plate, a supporting rod, a positioning disc and a sealing mechanism, a plurality of L-shaped plates are installed on the top of the positioning disc in a sliding mode, a support is installed on the supporting rod in a rotating mode, the support is connected with the L-shaped plates, and a rotating disc is fixedly installed at the bottom of the support. The top of the bottom plate is slidably provided with an anti-falling cap through an elastic component, and a plurality of inserting holes used for containing the anti-falling cap are formed in the peripheral side of the rotating disc so that the anti-falling cap can be embedded into the inserting holes to limit the rotating disc. According to the utility model, the L-shaped plates, the connecting rods, the support and the rotating disc are assembled to form the air tightness test tool, the distance between the adjacent L-shaped plates is adjustable so as to adapt to workpieces of different shapes and specifications, and compared with a traditional positioning mode that disassembly and reassembly are needed, the air tightness test tool is simple in structure and convenient to operate, greatly shortens the tool adjustment time, accelerates the test process and improves the detection efficiency.
Owner:CHANGCHUN WEISS TECH CO LTD