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27results about How to "Implementation settings" patented technology

Photovoltaic support and flexible tracking photovoltaic system

The invention discloses a photovoltaic support and a flexible tracking photovoltaic system, and the photovoltaic support comprises two groups of end stand columns which are arranged at intervals; the two ends of the main cables are tensioned and fixed by the end stand columns, every two adjacent main cables are arranged in parallel, a plurality of rotating nodes are arranged on the two main cables at intervals, and the rotating nodes are used for bearing the photovoltaic panel assemblies and driving the photovoltaic panel assemblies to rotate based on the main cables; the wind-resistant cable is arranged in the length direction of the main cable, and the wind-resistant cable and the main cable are connected into an integrated structure through the multiple wind-resistant frames. According to the flexible tracking photovoltaic system, the main cable, the wind-resistant cable and the wind-resistant frame are arranged, so that a stable bearing foundation is provided, the photovoltaic panel assembly is arranged, meanwhile, the photovoltaic panel assembly can track light rays when the photovoltaic panel assembly is assembled through the rotating effect of the rotating node based on the main cable, and the power generation efficiency of the flexible tracking photovoltaic system is improved.
Owner:HUIYAO PINSHANG ENERGY TECHNOLOGY (HANGZHOU) CO LTD

Interactive numerical simulation area setting method and device and electronic equipment

The invention provides an interactive numerical simulation area setting method and device and electronic equipment, and the method comprises the steps: obtaining an area setting parameter set; determining a target coordinate of each target vertex in each layer of nested region based on a region setting parameter set; calculating grid number indication data of each layer of nested region based on the target coordinates of each target vertex in each layer of nested region; determining a parent region of each layer of nested region, and determining an index of each layer of nested region in the corresponding parent region based on a target coordinate of a reference vertex in each layer of nested region; and filling the grid number indication data of each layer of nested region and the index of each layer of nested region in the corresponding parent region into a numerical simulation region configuration file, so that the numerical simulation region configuration file is used for supporting the operation of the target numerical model. According to the embodiment of the invention, the numerical simulation area configuration file can be conveniently obtained, so that the labor cost is reduced.
Owner:3CLEAR SCI & TECH CO LTD +2

Modified porous alumina as well as preparation method and application thereof

The invention discloses modified porous alumina as well as a preparation method and application thereof, and belongs to the technical field of diaphragm materials. The modified porous alumina comprises porous alumina and a modification additive, the modification additive comprises at least one of pyridine, imidazole, indole, quinoline and morpholine; the mass ratio of the porous aluminum oxide to the modification additive is (100: 1)-(100: 40); the particle size of the porous alumina is 0.1 mu m-2 mu m, the pore volume is 0.01 cm < 3 > / g-0. 1 cm < 3 > / g, and the pore diameter is 3 nm-50 nm. The particle size of the porous alumina in the modified porous alumina is small, so that the arrangement of a thin coating of the diaphragm can be realized; the porous aluminum oxide has specific pore volume and pore diameter, so that the liquid retention property and the ionic conductivity of the diaphragm are improved; in addition, the porous aluminum oxide is also loaded with a modification additive, so that the wettability can be improved, HF free in the electrolyte can be effectively captured, and the reliability and safety of the lithium ion battery are improved.
Owner:SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD

Concrete mold

The invention belongs to the technical field of concrete molds, and particularly relates to a concrete mold which comprises a bottom mold plate, a first outer mold plate and a second outer mold plate are arranged on the upper surface of the bottom mold plate, a fixed cross beam is connected to the top of the first outer mold plate and the top of the second outer mold plate, and an inner mold plate is connected to the bottom side of the fixed cross beam. A first mold hole is formed in the surface of the first outer mold plate, a second mold hole is formed in the surface of the inner mold plate, a transverse plate is connected to the inner wall of the inner mold plate, and a first threaded pipe penetrates through the interior of the transverse plate. According to the device, an embedded mold cylinder is inserted into a first mold hole and a second mold hole, when the embedded mold cylinder drives a threaded rod to move to a pipe opening of a first threaded pipe through a longitudinal plate and a first bearing, the threaded rod can rotate and move to the interior of the first threaded pipe, in this way, the position of the embedded mold cylinder can be fixed, and therefore reserved holes can be formed; the embedded mold cylinder is low in production process requirement and can adapt to pipe wall thicknesses of different concrete prefabricated pipelines.
Owner:JIANGXI PINGXIANG NANFANG BUILDING MATERIALS CO LTD

Positioning clamp for processing polyvinylidene fluoride plate

The utility model discloses a positioning clamp for processing a polyvinylidene fluoride plate, which relates to the technical field of plate processing tools and comprises a placing table. A clamping assembly is arranged on the placing table; the clamping assembly comprises a first rotating plate, a center hole is formed in the top of the first rotating plate, first rotating shafts are fixed to the positions, located on the two sides of the center hole, of the top of the first rotating plate, and second rotating plates are rotationally matched with the circumferential side faces of the first rotating shafts and located above the first rotating plate. A U-shaped plate is fixed to the peripheral side face of the second rotating shaft and located above the second rotating plate, and a clamping plate is fixed to one end of the U-shaped plate. The distance between the two clamping plates is changed through rotating fit between the first rotating plate and the two second rotating plates, multi-angle clamping and fixing of the device in the polyvinylidene fluoride plate machining process are achieved through threaded rotating fit between the threaded plate and the threaded rod, and the clamping stability of the device is improved.
Owner:CHANGZHOU KEXUN PRECISION MASCH CO LTD

Steel bar truss floor support plate with pre-embedded hanging supporting pieces and method

The invention discloses a steel bar truss floor support plate with embedded hanging supporting pieces and a method. The steel bar truss floor support plate comprises a truss and a bottom die. A through hole is formed in the position, corresponding to the needed hanging position, of the bottom die, a top fixing piece is welded to the top of the truss, a screw rod is vertically welded to the bottom face of the top fixing piece, and the bottom end of the screw rod penetrates through the through hole to extend to the position below the bottom die and is fixedly connected with a hanging rod hanging piece. The bottom ends of the screws of the hanging supporting pieces penetrate through the bottom die and extend to the position below the bottom die, the problem that after concrete is poured into the steel bar truss floor support plate, embedded parts at the bottom of a floor slab are not easy to find is solved, quick finding and quick installation of plate bottom hanging are achieved through simple bolt connection, and the situation that hanging objects are installed in a misplaced mode is avoided; and the damage to the floor support plate bottom die is reduced.
Owner:SHANDONG GUOSHUN CONSTR GRP

Chip and circuit structure for I2C address device information configuration

The invention discloses a chip and a circuit structure for I2C address device information configuration. The chip is connected to an I2C bus; the chip is provided with a detection pin, the detection pin of the chip is connected with the detection resistor, and when the resistance value of the detection resistor changes, the voltage value of the voltage signal at the detection pin changes; the chip stores the mapping relation between the voltage value of the voltage signal at the detection pin and the I2C address equipment information; and the chip is used for configuring I2C address equipment information by using the voltage signal at the detection pin based on the mapping relation. The invention further discloses a circuit structure, the circuit structure comprises a detection resistor and the chip, the first end of the detection resistor is connected with the detection pin of the chip, the second end of the detection resistor is grounded, and the chip is connected to the I2C bus so that the circuit structure can be connected to the I2C bus.
Owner:ZHUHAI AMICRO STAR TECHNOLOGY CO LTD

An underground large-span platform column-free station structure and construction method thereof

The present invention discloses an underground large-span platform column-free station structure and a construction method thereof, which belongs to the technical field of underground station construction. The present invention forms a space for accommodating equipment pipelines between the roof of the existing station and a corresponding horizontal tie plate is set below the roof arch, and the corresponding setting of the prestressed balance cable and the hanging plate ensures the reliable setting of the horizontal tie plate. The underground large-span platform column-free station structure of the present invention has a simple structure and convenient construction, and can effectively replace the existing underground station structure, avoid the same-layer setting of the equipment pipeline layer and the station hall layer, reduce the setting height of the station hall layer and the structural burial depth of the station, and can significantly reduce the setting of structural columns in the station hall layer and the platform layer of the underground station structure, improve the permeability of the underground station space utilization, facilitate passengers to get on and off the train, and improve the convenience of use of the underground station, and has good application prospects and promotion value.
Owner:CHINA RAILWAY SIYUAN GRP GUANGZHOU DESIGNING INST CO LTD +1

Working bucket device for insulated boom truck

A working bucket device for an insulated boom truck comprises an outer bucket (14) used as an outer packaging part, an inner bucket (11) used as a lining part, and an embracing ring part arranged between an opening part of the inner bucket (11) and an opening part of the outer bucket (14), composite wall layer type bucket body arrangement is achieved through the outer bucket (14) and the inner bucket (11), and the outer bucket (14) and the inner bucket (11) are combined through the embracing ring part. According to the working bucket, the inner bucket (11) and the outer bucket (14) are in lap joint, the lap joint opening parts of the outer bucket (14) and the inner bucket (11) are connected in an embedded mode, the thickness of the supporting wall body of the working bucket is increased, the technical problem that one insulating bucket body is used is solved, and therefore the supporting strength of the working bucket is improved.
Owner:SHANDONG TAIKAI VEHICLE MFG CO LTD

Coal rock sample preparation device and intelligent discrimination method

The invention provides a coal rock sample preparation device and an intelligent discrimination method, and belongs to the technical field of coal rock physical property testing. The device comprises a constant temperature and humidity chamber, a humidity control system and a sample processing and weighing system. An electric lifting platform in the sample processing and weighing system realizes separation of a sample vessel and a sample rotating disc during weighing through lifting action, so that the weighing precision is ensured. The central control and data acquisition system manages full-automatic'lifting-rotating-descending-weighing 'circulation through a finite-state machine model, and adopts an intelligent algorithm to automatically judge whether a sample reaches moisture balance or not by judging whether continuous multiple mass changes of the sample are smaller than a preset threshold value or not. The method is implemented in a central control and data acquisition system. According to the invention, the defects of low efficiency, easy interference of precision, strong subjectivity of equilibrium state judgment and the like in the traditional method are overcome, and batch, automatic and intelligent preparation of the coal rock equilibrium moisture sample is realized.
Owner:CNOOC ENERGY TECHNOLOGY & SERVICES LTD

Overlay mark placement method

The invention discloses an overlay mark placement method, which comprises the following steps of: 1, determining a distribution structure of crystal grains in an exposure area; step 2, performing lattice division on each crystal grain according to the distribution structure of the crystal grains to obtain a lattice area of each crystal grain; and step 3, grouping the photomasks according to the process layers. And 4, selecting a plurality of lattice point areas from the crystal grains of the photomask corresponding to each group of process layers as mark placement areas, and placing device area inner overlay marks in the mark placement areas, wherein the arrangement and the number of the overlay marks in the device area corresponding to the crystal grains meet the high-order compensation requirement of overlay errors. According to the method, the compensation value of the high-order correction overlay error of the device area can be accurately simulated and calculated, so that error compensation of the high-order compensation parameter of the overlay error in the exposure area can be prevented, and the yield of products, especially large-size crystal grain products, is improved.
Owner:SHANGHAI HUALI INTEGRATED CIRCUIT CORP

Automatic small injection molding machine

PendingCN122185478AImplementation settingsEffective inhalation
The present invention relates to an automatic small injection molding machine capable of automatically producing various products in a simple manual structure, including: a mold automatic setting part which automatically sets a mold for injection molding; a resin injection part which is provided at an upper side of the mold automatic setting part, melts resin and injects the resin into the mold; a piston part which is inserted into an upper side of the resin injection part and advances and retreats in an up-and-down direction to pressurize the resin inside the resin injection part in the direction of the mold; a piston pressurizing part which is provided in conjunction with the piston part and applies pressure to the piston part in the direction of the resin injection part; a control part which applies a pressure value and a pressurizing time applied to the piston part by the piston pressurizing part; a resin supply part which is provided at one side of the resin injection part and supplies resin into the resin injection part; and a product automatic discharge part which automatically discharges a product formed by the mold.
Owner:QNES GLOBAL CO LTD

Spectrum detection system based on unmanned aerial vehicle platform

The utility model belongs to the field of spectrum detection, and particularly relates to a spectrum detection system based on an unmanned aerial vehicle platform. The unmanned rotorcraft is adopted as a platform, the damping support is fixed below the unmanned rotorcraft through the mounting support, the host is fixed above the unmanned rotorcraft, and when the unmanned rotorcraft is used, the probe module can rotate in the horizontal direction and the vertical direction through the first holder and the second holder; the stability of image acquisition of the probe module in the flight process of the unmanned aerial vehicle is kept, and accurate monitoring of the system on the target is realized; different heights or scene targets can be better tested; meanwhile, the display can observe data acquisition states and acquisition results in real time, information intercommunication of an interactive interface is realized, and each state can be observed; and setting, modification, storage and application of parameters are realized.
Owner:SICHUAN DUALIX SPECTRAL IMAGING TECHNOLOGY CO LTD

A coaxial electric drive axle with large reduction ratio and vehicle

The utility model discloses a coaxial electric drive axle of big reduction ratio and vehicle, including motor, reduction mechanism and differential, reduction mechanism at least includes sun gear, planetary gear assembly, support ring gear and output ring gear, and differential includes rotator and two drive shafts, and planetary gear assembly includes planet carrier and with coaxial connection's first planetary gear and second planetary gear, and the rotor axle of motor is connected sun gear, and sun gear connects first planetary gear and / or second planetary gear, and first planetary gear and support ring gear are engaged, and second planetary gear and output ring gear are engaged, and output ring gear connects rotator, and one drive shaft of differential is arranged in the axle of rotor axle and sun gear's axle center, to guarantee the torque of motor output deceleration, increase the twist after transmission to rotator through reduction mechanism, and then guarantee the torque distribution to two drive shafts, and such can realize big reduction ratio, and the whole radial dimension is small, and cost is low and occupies small space.
Owner:XIAMEN NEVC ADVANCED ELECTRIC POWERTRAIN TECH INNOVATION CENT

Method for improving heat dissipation of FR4 circuit board

The invention provides a method for improving heat dissipation of an FR4 circuit board. The method for improving the heat dissipation of the FR4 circuit board comprises the following steps: obtaining a laminated FR4 composite core board; wherein the FR4 composite core plate is provided with a component mounting area; dense drilling operation is carried out on the installation area of the component, so that a specific heat dissipation area is formed in the thickness direction of the FR4 composite core board in a penetrating mode; performing copper deposition operation on the FR4 composite core board; performing modified heat-conducting ink hole plugging operation on the FR4 composite core board after the copper deposition operation so as to fill the modified heat-conducting ink in the specific heat dissipation area to obtain an FR4 composite core board A; and baking and curing the FR4 composite core board A, carrying out ceramic board grinding operation and outer layer circuit manufacturing, and finally carrying out resistance welding operation to obtain the FR4 circuit board. According to the method, the FR4 circuit board which is low in price and capable of ensuring that the overall thickness of the FR4 circuit board is not increased can be prepared, rapid heat dissipation of components is achieved, and the FR4 circuit board can better adapt to application of electronic products which are high in power and small in size.
Owner:CAMELOT QINGYUAN HYTEC TECH INVESTMENT

Laundry treating apparatus

The application discloses a clothes processing device, comprising: a drying air duct arranged above a drum assembly, the drying air duct comprising an air diffusing duct and two air chambers, the air diffusing duct being in communication with an air outlet and the two air chambers, and the two air chambers being in communication with an air inlet; a water box arranged on the top of the drum assembly and in communication with a clothes accommodating chamber, the water box being located on one side of the air diffusing duct, and the top of the water box being provided with an exhaust air duct in communication with the inside of the water box, one end of the exhaust air duct being in communication with the air diffusing duct; wherein the air in the water box can enter the air diffusing duct through the exhaust air duct, and the airflow direction of the exhaust air duct entering the air diffusing duct is consistent with the airflow direction in the air diffusing duct. Therefore, the air in the water box can be introduced into the drying channel through the exhaust air duct, and then introduced into the drum assembly through the drying channel, so that the exhaust of the water box is realized, the setting of the exhaust pipe is reduced, the structure is simplified, and the cost is reduced.
Owner:HISENSE(SHANDONG)REFRIGERATOR CO LTD

Safe intelligent lock system

The utility model discloses a safe intelligent lock system which comprises an intelligent lock, the intelligent lock comprises a lock body, and the intelligent lock further comprises an activation module which outputs an activation signal to activate the intelligent lock; the identity verification input module is used for receiving input identity verification information after the intelligent lock is in the activated state; the control module is used for receiving the identity verification information and unlocking the intelligent lock after confirming that the identity verification information is correct; the voice recognition module collects external voice after the intelligent lock is in a normal working state, recognizes the voice and outputs a control signal according to a recognition result, and the control module outputs a corresponding response signal according to the control signal; the voice output module is used for outputting a corresponding voice prompt according to the response signal; the camera module is used for shooting an image in front of a door after receiving the activation signal; and the wireless communication module is used for wirelessly sending out the image shot by the camera shooting module. The device is good in safety and convenient to operate.
Owner:广东臣家智能科技有限公司

A smart medicine box

The invention discloses an intelligent medicine box, comprising a shell, a mounting hole opened on the top of the shell, a steering gear installed on the top of the shell for controlling an upper cover, the upper cover matches the mounting hole and is located directly above the mounting hole, a fixing plate installed on the inner wall of the shell and located directly below the upper cover, at least one group of first medicine dispensing and delivery mechanisms installed at the bottom of the fixing plate, a base arranged below the at least one group of first medicine dispensing and delivery mechanisms, at least one group of second medicine dispensing and delivery mechanisms installed on the upper surface of the base, a first conduit installed on the lower surface of the base for matching and connecting each group of second medicine dispensing and delivery mechanisms, at least one group of third medicine dispensing and delivery mechanisms installed on the upper surface of the base, a second conduit installed on the lower surface of the base for matching and connecting each group of third medicine dispensing and delivery mechanisms, a first medicine box for receiving medicine, a one-touch button installed on the shell, and a speaker; the medicine box has the advantages of high intelligence, convenience and speed, humanized design, and accuracy and timeliness of taking medicines.
Owner:SHAANXI UNIV OF SCI & TECH

Method and system for realizing intelligent linkage of user manual on IPPBX (Internet Protocol Private Branch Exchange), IPPBX and server

The invention provides a method and a system for realizing intelligent linkage of a user manual on an IPPBX (Internet Protocol Private Branch Exchange), the IPPBX and a server, and the method comprises the following steps: responding to an instruction which is sent by a user and requires help, and displaying a help dialog box; responding to an IPPBX configuration problem input by a user, and sending a question helping request to the cloud server according to the IPPBX configuration problem; the IPPBX receives answers returned by sorting of the cloud server, wherein the answers comprise contents of document data vectors which are retrieved by the cloud server from a corresponding vector database stored in a user manual corresponding to a firmware version of the IPPBX and are matched with the question helping request; wherein the contents of the matched document data vectors in the returned answers are ranked according to the matching degrees with the IPPBX configuration questions, and the contents with the highest matching degree are ranked in the first place; the IPPBX analyzes the answers returned through sorting, and the document data content ranked in the first place serves as an answer to be displayed in the dialogue question and answer box. By using the technical scheme, the user can quickly find the function configuration steps in the user manual.
Owner:XIAMEN XINGZONG DIGITAL TECH CO LTD

Size detection device for shielding frame processing

The utility model discloses a size detection device for shielding frame processing, which relates to the technical field of shielding frame processing and comprises a turntable assembly, the turntable assembly comprises a base, an electric turntable is fixedly mounted in the middle of the base, a mounting hole is formed in the surface of the electric turntable, and a tool assembly is fixedly mounted in the mounting hole. A detection module is fixedly installed at one end of the top of the base and comprises a fixing frame, the fixing frame is of a C-shaped structure, the outer side of the electric rotating disc penetrates through the fixing frame, two cameras are arranged at the top of the inner side of the fixing frame, a camera is arranged at the bottom of the inner side of the fixing frame, and a control panel is fixedly installed at the top of the fixing frame. A transmission interface is formed in one end of the top of the control panel; according to the utility model, the size of the shielding frame can be automatically detected, the accuracy of the size detection can be improved, the bearing sheet can be conveniently replaced according to the size of the shielding frame, and the practical value is high.
Owner:SHENZHEN XINLIYUAN HARDWARE PLASTIC CO LTD

Slice Analysis Method for Bearer Network

ActiveCN115250500BImplementation settingsWireless communicationEngineeringNetwork topology
The present invention provides a slice analysis method for a bearer network, comprising: receiving an orchestration scheme of a network slice generated by a bearer network slice subnet management system TN‑NSSMF based on a basic network topology and delay information of the bearer network, wherein the basic network topology and delay information are updated based on delay indicator data obtained through monitoring; performing basic delay verification on the orchestration scheme based on a basic delay between source and destination nodes in the orchestration scheme and an SLA delay requirement of the network slice; if the verification passes, sequentially configuring static network resources and business slice resources of the network slice based on the orchestration scheme, and monitoring the delay indicator data of the static network resources and the business slice resources, thereby solving the problem of scientifically and reasonably decomposing the delay indicator in the SLA of the end-to-end network slice, and realizing the delay indicator decomposition of the end-to-end network slice and the delay indicator setting in the bearer network sub-slice template.
Owner:CHINA MOBILE GRP BEIJING +1

High-speed magnetic levitation assembly type track structure capable of being accurately adjusted

The invention provides a high-speed maglev assembly type fine-adjustable track structure which is characterized in that a track plate is fixedly connected to the upper end of a base through a cast-in-place connecting layer, an adjusting component is arranged at the lower end of the base, the adjusting component is connected to a lower foundation bearing structure through a footstone, a pouring hole is formed in the track plate, and a second connecting rib 10 is arranged on the side wall of the pouring hole; first connecting ribs are arranged at the upper end of the base, second connecting ribs are located in the pouring holes and bound with steel bars in the cast-in-place connecting layer on site, the first connecting ribs are bound with a steel bar mesh in the cast-in-place connecting layer on site, the cast-in-place connecting layer is formed in the pouring holes, the upper end of the base and the lower end of the track plate through pouring, and overall functional areas are arranged on the two sides of the track plate. According to the track structure, separation of the track structure and foundation bearing structures such as a bridge is achieved, and the track structure is suitable for different foundation structures such as the bridge, a roadbed and a tunnel; and by adopting the prefabrication and assembly technology, manufacturing, transportation and installation are more convenient, and the construction quality and precision of the track structure can be improved.
Owner:CHINA RAILWAY DESIGN GRP CO LTD +1

Crawling ladder device for engineering vehicle with lifting supporting legs

ActiveCN222388080UImplement integrated installationImplementation settingsSteps arrangementVehicle frameControl theory
A ladder stand device for an engineering vehicle with lifting supporting legs comprises an upper ladder assembly (1) installed on a frame of the engineering vehicle, a crank arm ladder assembly (2) used as a lower pedaling body and a tension connecting rod component arranged between the crank arm ladder assembly (2) and the upper ladder assembly (1), split ladder stand arrangement is achieved through the upper ladder assembly (1) and the crank arm ladder assembly (2), and the upper ladder assembly (1) and the crank arm ladder assembly (2) are connected through the tension connecting rod component. Lifting motion connection of the crank arm ladder assembly (2) is achieved, the lower end body of the ladder assembly installed on the frame of the engineering vehicle is in a height position adjustable state, and the technical problem that the lower end of the whole ladder assembly is close to the ground due to the fact that the whole ladder assembly is installed on the frame of the engineering vehicle is solved. Therefore, the passing performance of the engineering vehicle with the lifting supporting legs is improved.
Owner:SHANDONG TAIKAI VEHICLE MFG CO LTD

Vehicle-mounted telescopic line multi-interface docking station

The embodiment of the utility model relates to a vehicle-mounted telescopic line multi-interface docking station, and belongs to the technical field of docking stations. The vehicle-mounted telescopic line multi-interface docking station comprises a shell, a PCBA board located in the shell and a conductive ejector pin located at the front end of the shell, the conductive ejector pin is electrically connected with the PCBA board, the vehicle-mounted telescopic line multi-interface docking station further comprises a cover body, at least two telescopic lines and at least one telescopic module, the cover body is fixed to the rear end of the shell, and the telescopic module is installed in the shell. One end of each telescopic line is connected with the PCBA board in the shell, the other end of each telescopic line extends into the cover body and extends out of the cover body after being wound around one telescopic module, and the telescopic module is used for rebounding to drive the line clamping disc to rotate to take back the telescopic line; the cover body is further provided with at least one USB port, and the front face of the cover body is provided with a mobile phone fixing piece. According to the vehicle-mounted telescopic line multi-interface docking station provided by the embodiment of the invention, the problem that the interior of a vehicle is disordered due to the fact that external connection lines are needed when docking station products are used is solved, and the use is convenient.
Owner:SHENZHEN LUOXI TECH CO LTD