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87 results about "Basic power supply" patented technology
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Semiconductor integrated circuit device and its power supply wiring method
InactiveUS20060239102A1Improve stabilityReduce voltage dropSemiconductor/solid-state device detailsSolid-state devicesBasic power supplySemiconductor
The present invention discloses a power supply wiring method for stabilizing operation of a semiconductor integrated circuit device. A power supply mesh 24, which is arranged on an upper layer of a basic power supply wires 18 for supplying power to a logic circuit portion 13, includes vertical reinforcing power supply wires 22 and lateral reinforcing power supply wires 23. The widths of the vertical reinforcing power supply wires and lateral reinforcing power supply wires are optimized to mitigate IR drop or excessive current density in each division unit u0.
Owner:SANYO ELECTRIC CO LTD
Dual power protective device for power supply
A lock cylinder includes a sliding fastening bolt, and an unlocking mechanism disposed in a housing. The characteristics thereof are that the unlocking mechanism is consisted of a fixed cylindrical block, a lock cylinder core and a pressing cylindrical block that are all provided with a plurality of corresponding orifices, respectively. A portion of the orifices at the fixed cylindrical block and the pressing pin cylindrical block is provided with spring pins and a pressing pin respectively. The lock cylinder core further impels the fastening bolt by an interlocking mechanism while a key is provided with an inserting pin for inserting into the orifice at the pressing cylindrical block to push the pressing pin inward that further pushes the spring pin into the orifice at the fixed cylindrical block, thus further turning the lock cylinder core and impelling the sliding fastening bolt for unlocking and obtaining an optimal anti-theft effect.
Owner:LIU SHUN MING
Multi-layered printed wiring board
InactiveUS20050039947A1Reduce radiated noiseCross-talk/noise/interference reductionPrinted circuit aspectsBasic power supplyEngineering
A multi-layered printed wiring board is provided that is capable of securing required wiring density even with a decreased number of wiring layers and reducing radiation noises. The multi-layered printed wiring board has at least three wiring layers each at least having at least one power supply line or a ground line, and another kind of line, said wiring layers each having an outer edge. A ground line is formed at the outer edge of at least one of the wiring layers. A basic power supply line is formed inside the ground line. At least one power supply line extends from the basic power supply line. A plurality of electronic parts are mounted on at least one of the wiring layers. The at least one power supply line is wired to mounting positions of the electronic parts via at least one of the wiring layers.
Owner:CANON KK
Power supply system without passing neutral phases in whole journey of high-speed passenger transport line motor train unit
InactiveCN104015632AImprove securityGuaranteed power factorPower supply linesBasic power supplyDouble phase
The invention relates to a power supply system without passing neutral phases in the whole journey of a high-speed passenger transport line electric multiple units (EMU), and belongs to the field of power supply of high-speed EMU. A cantilever at the upper end of an anchoring section pillar is provided with two catenary wires, the catenary wires are connected with droppers, the droppers are connected with a single-phase alpha contact line and a single-phase beta contact line which are output from the secondary side of a traction transformer, the single-phase alpha and the single-phase beta are parallel, are insulated with each other, are input into the internal power supply system of the EMU through double-phase pantographs and are connected with a basic power supply unit TUB1 and a basic power supply unit TUB2 respectively, and the basic power supply unit TUB1 and the basic power supply unit TUB2 are separate with each other. No circuit breaker switch or neutral insulating section is needed to be arranged on the single-phase alpha and the single-phase beta, and no negative-sequence current generates in a three-phase high-voltage supply network. The invention further provides a circuit structure used for improving a CRH1-model 8-compartment EMU and a CRH5-model 8-compartment EMU into a 6-compartment EMU, a 10-compartment EMU, a 12-compartment EMU and a 16-compartment EMU recombined by two 8-compartment EMUs and for brake regenerative braking.
Owner:JILIN UNIV
Methods and Circuits for Optimizing Performance and Power Consumption in a Design and Circuit Employing Lower Threshold Voltage (LVT) Devices
InactiveUS20110163801A1Improve performanceIncrease power consumptionCAD circuit designSoftware simulation/interpretation/emulationVoltage amplitudeBasic power supply
Methods and circuits for optimizing performance and power consumption in a circuit design and circuit employing one or more lower threshold voltage (Lvt) cells or devices are described. A base supply voltage amplitude is determined for providing operating power for the circuit. The base supply voltage amplitude is a low or lowest voltage level that still satisfies a performance specification for the circuit. Providing a low or lowest base supply voltage level reduces or minimizes the standby (i.e., non-switching) power consumption in the Lvt device(s) since current leakage is reduced as the supply voltage level is reduced. Reducing the supply voltage level used to power the Lvt device(s) also reduces active power consumption for the circuit as well. Thus, total power consumption is optimized or reduced while still receiving the benefit of using Lvt devices to optimize or increase performance of a circuit layout and circuit.
Owner:QUALCOMM INC
Contactless power supplying device
A contactless power supplying device is provided. A primary coil and a basic power supplying unit circuit are arranged in a power supplying area. The primary coil supplies secondary power through electromagnetic induction to a secondary coil of a power receiving device in the power supplying area. The basic power supplying unit circuit excites the primary coil in the power supplying area. The basic power supplying unit circuit transmits an oscillation signal from the power supplying area to the power receiving device, receives a modulated wave signal from the power receiving device that detects a modulation wave that is in accordance with a magnetic flux change, and detects the modulated wave signal to demodulate the modulation wave. A system control unit determines whether or not a metal foreign object is present in the power supplying area corresponding to the basic power supplying unit circuit based on the modulation wave.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Single fire-wire phase-front dynamic AC power fetching module
ActiveUS9837928B1Reduce EMI noiseIncrease powerAc-dc conversion without reversalAc-ac conversionBasic power supplyFull bridge
A single fire-wire phase-front dynamic AC power fetching module, comprising: two series-connected type synchronous power fetching circuits connected in parallel, and an electronic switch connected thereto, one series-connected type synchronous power fetching circuit is used to perform positive phase AC power fetching, while the other series-connected type synchronous power fetching circuit is used to perform negative phase AC power fetching. The electronic switch is formed by a relay or a silicon control crystal (TRIAC) controlled by an MCU microprocessor. As such, through adopting bi-directional dynamic full-bridge type power fetching, for a single fire wire, it is able to perform power fetching twice in a cycle. The duration of power fetching can be regulated automatically depending on the load, to compensate for the power, and supply it to an outside circuit as the basic power supply.
Owner:LOONG YEE INDAL CORP
Power factor correction by measurement and removal of overtones
InactiveUS7719862B2Increase flexibilityReduce sensitivitySpectral/fourier analysisPulse automatic controlEngineeringControl circuit
Owner:WRATHALL ROBERT S
Optimization policy-based power distribution network planning project automatic optimization method
The invention discloses an optimization policy-based power distribution network planning project automatic optimization method. By analyzing a relationship between development scale of a power distribution network of a region and power load increment, in combination with historical power network indexes and investment degree changes of the region, and based on current power network problems, loadprediction results and region investment policies, the priority levels of projects are automatically sorted, and a power network investment lower limit, namely, a rigid investment demand is calculated; by specifying an investment upper limit, the projects are automatically optimized; and the projects having the urgency degrees of priority and meeting the investment plan requirements are screened out. According to the optimization policy-based power distribution network planning project automatic optimization method, for the problems in current power distribution network planning project optimization sorting work, basic power supply obligations and investment benefit optimization of power network enterprises are comprehensively considered; a project optimization method is proposed; a project optimization sorting model is built; a quantitative analysis basis is provided for project optimization; and scientific guidance is provided for power network planning investment decisions.
Owner:KUNMING ENERSUN TECH +1
Switching power supply
ActiveUS20110261531A1Reduce the number of partsReduce the number of stepsConversion constructional detailsCooling/ventilation/heating modificationsBasic power supplySwitching power
A switching power supply has electronic parts that configure a switching circuit. The electronic parts are accommodated in a casing. A seat member is formed unitarily with the casing on which the electronic parts are mounted. A coolant channel is formed through the seat member so as to be open at least at two positions of an outer wall surface of the casing. Coolant that flows through the coolant channel cools the electronic parts mounted on the seat member.
Owner:DENSO CORP
Hybrid power management states
InactiveUS20060224905A1Volume/mass flow measurementPower supply for data processingBasic power supplySoftware engineering
A base ACPI power management state is selected and a feature of a power management state that is to be created is defined. The definition of the power management state to be created is attached to an object of the base ACPI power management state in an ACPI namespace.
Owner:MICROSOFT TECH LICENSING LLC
Electro-optical device, matrix substrate, and electronic equipment
InactiveUS20090289931A1Reduce display effectSmooth displayElectroluminescent light sourcesSolid-state devicesBasic power supplyPower circuits
The invention provides power-supply wiring preferable for large displays. An electro-optical device according to the present invention includes a pixel area including electro-optical elements driven by power supplied from power-supply circuits. The electro-optical device includes basic power-supply lines, which receive a power-supply voltage output from the power-supply circuits and which are formed on the upper portion of a substrate, and includes main power-supply lines which intersect the basic power-supply lines and which are formed on the upper portion of the substrate. The power-supply voltage is supplied to the electro-optical elements via the main power-supply lines.
Owner:SEIKO EPSON CORP
Wireless sensor node
InactiveUS20100146356A1Minimize power consumptionError prevention/detection by using return channelCode conversionBasic power supplyWireless transceiver
A wireless sensor node is provided which is divided into functional modules on a function basis and operates the functional modules to cooperatively perform its individual functions. The wireless sensor node includes a wireless transceiver to wirelessly communicate with a control node; a primary configuration unit to set a node identification address in communication with a control node; a secondary configuration unit to use the node identification address to register with the control node and set an address for communication which is assigned by the control node; a basic power supply to supply power to modules for communication and sensor control; functional modules to perform data processing and sensor control; and a functional module activator to activate the functional modules according to a type of received data or an operation for data transmission.
Owner:ELECTRONICS & TELECOMM RES INST
Semiconductor integrated circuit for reducing leak current through MOS transistors
ActiveUS20070074134A1Eliminate needReduce inrush currentPower reduction by control/clock signalSolid-state devicesElectricityBasic power supply
A semiconductor device is composed of: a power control region within which function cells are arranged; a basic power supply line overlapping said power control region, and positioned in a power supply interconnection layer; a virtual power supply line arranged in said power control region in a direction perpendicular to said basic power supply line, said function cells being connected to said virtual power supply line; a ground line arranged in said power control region in said direction perpendicular to said basic power supply line; a switch cell including a metal interconnection positioned in a metal interconnection layer different from said power supply interconnection layer, and a switch element electrically connected between said metal interconnection and said virtual power supply line; and a via contact connected between said basic power supply line and said metal interconnection. The switch cell is positioned within power control region. The switch element is positioned adjacent to said via contact within said switch cell. The metal interconnection is positioned between said virtual power supply line and said ground line within said switch cell.
Owner:RENESAS ELECTRONICS CORP
Planned project selecting and sequencing method comprehensively taking basic power supply responsibility of power network enterprise into consideration for low and medium voltage distribution network
InactiveCN105205573AMaximize the benefits of planning investmentForecastingResourcesBasic power supplyPower grid
The invention provides a planned project selecting and sequencing method comprehensively taking basic power supply responsibility of a power network enterprise into consideration for a low and medium voltage distribution network. The planned project selecting and sequencing method is characterized in that based on the property of public undertaking unit of the power network enterprise, defining the property of a project performing the basic power supply responsibility, and dividing the projects into two types of compulsory projects needing not to participate sequencing and to-be-selected projects needing to participate sequencing; analyzing the benefits and cost constitution of the to-be-selected projects, classifying and sequencing the to-be-selected projects of different types according to the reference of the benefit-to-cost ratio, and taking projects of which the benefit-to-cost ratio is large as preferred projects, so as to meet the maximization of project planning investment benefit of the enterprise under the premise of performing the basic power supply responsibility. The method can be effectively applied to selecting and sequencing of the low and medium voltage distribution network planned projects, so as to guide the power network enterprise to maximize the project planning investment benefit under the premise of performing the basic power supply responsibility while planning the projects.
Owner:STATE GRID FUJIAN ELECTRIC POWER CO LTD +2
Inland shore-based AIS (Automatic Identification System) ship data wireless transmission device and transmission method
InactiveCN106101073AReduce transmission costsImprove wireless transmission efficiencyNetwork traffic/resource managementMarine craft traffic controlBasic power supplyWireless transmission
The invention relates to an inland shore-based AIS (Automatic Identification System) ship data wireless transmission device and a transmission method. The device comprises a communication antenna, a solar cell panel, a storage cell, a GPRS communication module, an AIS data filtering module, an AIS shore-based receiver, a protection box and a support rod. The communication antenna, the solar cell panel and the protection box are fixed on the support rod. The storage cell, the GPRS communication module, the AIS data filtering module and the AIS shore-based receiver are fixed in the protection box. The connection is that the storage battery is unidirectionally connected with the GPRS communication module, the AIS data filtering module and the AIS shore-based receiver. The AIS data filtering module is bidirectionally connected with the GPRS communication module and the AIS shore-based receiver. The GPRS communication module is connected with the communication antenna through a radio frequency cable. The solar cell panel is connected with the storage cell. The technical effects are that redundant AIS message information can be filtered, the wireless transmission efficiency is improved, the public network transmission costs are reduced, and the device and the method are especially applicable to remote inland waterway regions in which AIS standard base stations cannot be applied due to the fact that there is no infrastructure such as a basic power supply and the internet.
Owner:TIANJIN 712 COMM & BROADCASTING CO LTD
Typical wiring diagnostic analysis method of distribution network line
ActiveCN110598975ASave human effortSave moneyEmergency protective circuit arrangementsRelational databasesBusiness PersonnelBasic power supply
Owner:GUANGDONG POWER GRID CO LTD +1
Supply unit and power supply system
InactiveCN106730498AGuaranteed safety and reliabilityGuarantee safety and reliabilityFire rescueBasic power supplyEngineering
The embodiment of the invention provides a supply unit and a power supply system. The supply unit comprises a battery module, a first fire extinguishing device and a second fire extinguishing device, wherein the first fire extinguishing device and the second fire extinguishing device are fixedly connected with the two ends of the battery module correspondingly. The battery module comprises a plurality of battery individuals. One end of each battery individual is connected with the first fire extinguishing device, and the other end of each battery individual is connected with the second fire extinguishing device. The first fire extinguishing device comprises a first fire extinguishing bin shell and a first installation mechanism, and the first fire extinguishing bin shell is arranged on the side, far away from the battery module, of the first installation mechanism. The second fire extinguishing device comprises a second fire extinguishing bin shell and a second installation mechanism, and the second fire extinguishing bin shell is arranged on the side, far away from the battery module, of the second installation mechanism. The supply unit and the power supply system can extinguish fire for the battery individuals when the battery individuals in the battery module explode, the situation that the whole battery module explodes and is damaged due to the exploded battery individuals cannot occur to the battery module, and the safety and reliability of batteries are guaranteed.
Owner:HUATING HEFEI POWER TECH
Triangle extension power-supply system
ActiveCN101888096AOptimize layoutLower requirementAc-dc network circuit arrangementsEmergency power supply arrangementsBasic power supplyElectrical and Electronics engineering
The invention relates to a power-supply system, in particular to a triangle extension power-supply system, which is a dual ring network among three power-supply point feed-out stations so as to form a triangle power-supply system to supply power for a setting power-supply area; the dual ring network connection is arranged in the periphery of the power-supply area and between each two power-supply points, i.e. A station and B station, B station and C station and A station and C station, thus forming a power-supply system with a triangle structure; and a central area is set in the power-supply area, and each two power-supply points which pass through the central area are connected by a single ring network among stations. The advantages of the invention lie in that a triangle is a stable geometric figure, three power-supply points are easy set to form a triangle power-supply area in the power-supply area, thereby having flexible and reliable power-supply performance; three power-supply points in a basic model are needed, stationing is simple and convenient and economical efficiency is high. The system can carry out system extension by skillfully using geometrical property of the triangle based on the periphery of the developed triangle extension basic power-supply system.
Owner:STATE GRID CORP OF CHINA +1
Switching power supply
ActiveUS8817468B2Reduce the number of partsReduce the number of stepsConversion constructional detailsIndirect heat exchangersBasic power supplySwitching power
A switching power supply has electronic parts that configure a switching circuit. The electronic parts are accommodated in a casing. A seat member is formed unitarily with the casing on which the electronic parts are mounted. A coolant channel is formed through the seat member so as to be open at least at two positions of an outer wall surface of the casing. Coolant that flows through the coolant channel cools the electronic parts mounted on the seat member.
Owner:DENSO CORP
Range-extended C+B dynamical system
ActiveCN102582461AAbundant storageIncrease offline mileageVehicular energy storageElectric propulsionCapacitanceBasic power supply
The invention relates to a range-extended C+B dynamical system comprising a basic power supply module, an auxiliary power supply module, a high-voltage power distribution apparatus, a vehicle control unit, a motor module and an auxiliary unit. The basic power supply module is connected with the vehicle control unit, and further connected with the motor module via the high-voltage power distribution apparatus, and the basic power supply module supplies power for the motor module; the auxiliary power supply module is connected with the vehicle control unit, and further connected with the motor module via the high-voltage power distribution apparatus, and the auxiliary power supply module supplies power for the motor module when the basic power supply module supplies no power. For a super capacitor pure electric power bus with the C+B dynamical system provided by the invention, starting from the characteristic that the super capacitor stores electrical energy, a group of power batteries are added on the basis of the original super capacitor system, thus, the finished automobile can store more electrical energy so as to increase the off-line travelling distance.
Owner:YANGZHOU YAXING MOTOR COACH
Remote monitoring center with seismic device controller and control operation method thereof
InactiveCN103676917ASolve remote maintenance problemsEnhance operational support capabilitiesTotal factory controlProgramme total factory controlBasic power supplyMarine engineering
The invention provides a remote monitoring center with a seismic device controller and a control operation method thereof, which aim at solving the problems that a majority of malfunctions of a seismic monitoring system occur on a basic power supply part, the electronic elements and devices are easy to breakdown by the lightning when the software problem such as system halt of the device, the environment cannot be continuously and effectively monitored in real time, and the maintenance personnel need to restore the functions of the seismic monitoring system on site. The remote monitoring center is provided with a lightning-proof device which is connected with a seismic station through a remote terminal so as to reflect the situation of the seismic station in real time. The remote monitoring center has the beneficial effects that the remote maintenance problem of the seismic device is solved, the operation guaranteeing capacity of the seismic monitoring system can be enhanced through the system construction, and the service capacity of the seismic monitoring system can be enhanced. Moreover, a lightning arrester is used for preventing the controller from being broken down in the lightning and rainy days. The remote monitoring center and the control operation method have the characteristics of simplicity in operation, good safety stability, strong practicability and the like.
Owner:辽宁省地震局
Power output device and power enhancement member
InactiveUS20100181878A1Increase inertiaSmooth and stable outputRotating vibration suppressionMachines/enginesBasic power supplyDrive shaft
A power output device and a power enhancement member are provided. The power output device includes: a basic power supply member, a driving shaft, an output shaft, a clutch and a power enhancement member. The power enhancement member includes a rotation portion and a plurality of weight elements arranged on the rotation portion. In operation, the rotation portion rotates together with and around the output shaft, the plurality of weight elements in turn rotate together with the rotation portion around the output shaft. Meantime, the plurality of weight elements also make predetermined reciprocating movement relative to the rotation portion, such that the center of gravity of the power enhancement member is always offset from the output shaft towards a constant direction, thereby to promote and stabilize the rotation of the output shaft. The present invention is especially useful in applications that need large power output.
Owner:YU CHUN KWAN
Switching power supply
ActiveUS10033265B2Improve power factorGuaranteed uptimeEfficient power electronics conversionDc-dc conversionPower flowBasic power supply
Owner:FUJI ELECTRIC CO LTD
Intelligent efficient fully-automatic tracing electricity economizer
InactiveCN1980050ARealize free start and stopWon't burn outAC motor controlEmergency protective circuit arrangementsCapacitanceBasic power supply
The electricity saving device is composed of central control circuit board, setting and adjusting circuit, protection circuit etc. Central control system is modularized logic circuit including parts: (1) AC / DC basic power supplies, and command signal; (2) multifunctional protection circuit for lack of phase, phase loss, under voltage etc. and audible and visual alarm circuit; (3) soft setting up and adjusting circuit; (4) quick detecting circuit; (5) central processing system circuit; (6) automatic tracking system; (7) circuit for setting up adjustment for saving electricity; (8) system circuit of automatic conversion and one unit for driving multiple units; (9) double-tracking and precision adjustment circuit; (10) thyristor protective circuit; (11) circuit for indicating voltage and current. The invention implements starting and stopping each motor in group-control, capable of replacing switch box, starting device, capacitance compensation device, remote control through computer.
Owner:张铮震
Energy supply scheme configuration system and method based on multi-energy complementation of smart park
InactiveCN112653201AReduce economic lossIncrease operating powerAc-dc network circuit arrangementsElectric powerBasic power supplyElectric power system
The invention discloses an energy supply scheme configuration system and method based on multi-energy complementation of smart park. The energy supply scheme configuration system comprises a multi-energy power supply system, an energy storage system, an electric power configuration system, electric equipment, and a power supply monitoring system, wherein the output ends of the multi-energy power supply system and the energy storage system are connected with the input end of the electric power configuration system. The invention relates to the technical field of power systems. According to the energy supply scheme configuration system and method based on multi-energy complementation of the smart park, by arranging the electric power configuration system, total output electric power can be preferentially supplied according to a preset level, it is guaranteed that some important electric appliances are preferential and meet the most basic power supply when electric power is insufficient, economic losses can be reduced, when electric power is sufficient, the redundant electric power except the basic electric power is distributed in proportion and gradually increased to the normal operation power of the equipment, the electric power can be distributed more reasonably, important equipment is prevented from stopping operating, electric power waste is avoided, and cost is saved.
Owner:ZHEJIANG ZHONGXIN POWER ENG CONSTR CO LTD +2
Semiconductor integrated circuit device and its power supply wiring method
InactiveCN1754259ASolid-state devicesSemiconductor/solid-state device manufacturingBasic power supplySemiconductor
A wiring method of power supply for a semiconductor integrated circuit device operating stably. A power supply mesh (24) provided in a layer overlying a basic power supply wiring (18) for supplying power to a logic circuit section (13) includes a longitudinal reinforcing power supply wiring (22) and a lateral reinforcing power supply wiring (23). Widths of the longitudinal reinforcing power supply wiring (22) and the lateral reinforcing power supply wiring (23) are optimized to relax an IR drop or an excessive current density for each division unit u0.
Owner:SANYO ELECTRIC CO LTD
Transferring sickbed with mobile power supply
The invention discloses a transferring sickbed with a mobile power supply. The transferring sickbed comprises a bed body assembly, a support assembly and a moving assembly, wherein the bed body assembly comprises a bed plate, a sickbed guardrail and an infusion bottle support; the sickbed guardrail is arranged above the bed plate and is rotationally connected with the bed plate; the infusion bottle support is arranged at the left end of the bed plate; the infusion bottle support is rotationally connected with the bed plate; a storage battery is arranged on a sickbed support seat of the transferring sickbed; a storage battery protection case is arranged outside the storage battery for protecting the storage battery; when the transferring sickbed is used for transferring a patient, a power supply of a respirator and an infusion pump can be connected onto a storage battery, so that the storage battery can supply electricity to the respirator and the infusion pump in a short time; the normal use of the respirator and the infusion pump can be ensured; the safety guarantee is provided for the patient; charged equipment can still be used in the transferring process; convenience is broughtto the transferring process.
Owner:常州朝旭企业服务有限公司
Space-borne GNSS receiver based on reconfigurable modularization
PendingCN114137582AClear definitionThe function of the module is clearSatellite radio beaconingComputer hardwareBasic power supply
A satellite-borne GNSS receiver based on reconfigurable modularization adopts modular design and comprises a radio frequency module, a navigation module, a control module and a bottom plate. Wherein the radio frequency module, the navigation module and the control module adopt standardized structural design, the modules can be reconfigured and combined, multi-antenna input and multi-machine redundant backup can be supported, and the system is suitable for satellite-borne scenes. The radio frequency module receives multipath antenna GNSS radio frequency signal input and completes amplification, combination and power division processing. The navigation module captures, tracks and positions GNSS signals based on an integrated navigation chip; the control module completes communication with the on-satellite subsystem, control instruction receiving and execution and the like based on the main control CPU; and the bottom plate is used for providing interconnection among modules, external interfaces and basic power supply. The method is suitable for complex satellite-borne scenes, has the reconfigurable characteristic, and has flexibility, universality and reliability, the design cost can be greatly reduced, and batch production capacity is achieved.
Owner:BEIJING MXTRONICS CORP +1
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