China latest patents query

The latest invention patents collect the data information of China invention patents from 2000 to 2024, typesetting according to the date of patent publication, including patent number, application date, invention Bibliographic data, abstracts, and specification data of people are convenient for scientific researchers to quickly browse and search for patents.

Anti-interference shielding communication tow-chain cable and preparation method thereof

InactiveCN105655024AExtended service lifeImprove insulation performanceFlexible cablesCable/conductor manufactureInsulation layerInterference resistance

Owner:SHENZHEN LIANJIAXIANG SCI & TECH

Fence skin manufacturing process

InactiveCN104985397AThe end result is the sameEasy to operateMachiningWire rope

Owner:SHANGHAI ZHENHUA HEAVY IND GRP NANTONG TRANSMISSION MACHINERY

Large-size micro-permeable composite film and preparation method thereof

PendingCN109814185AGood light transmissionHigh hazeDiffusing elementsComposite filmUltraviolet lights

Owner:JIANGSU SHUANGXING COLOR PLASTIC NEW MATERIALS

Intelligent irrigation inspection vehicle and irrigation method

ActiveCN107389130ACompact structureSimple structureWatering devicesEarth material testingMotor speedAgricultural engineering

Owner:SOUTHWEST JIAOTONG UNIV

Energy-saving temperature raising device for steel ladle baking

ActiveCN113477915AStable productionPrecise control of air-fuel ratioMelt-holding vesselsCasting safety devicesEconomic benefitsAir–fuel ratio

Owner:SHENYANG POLYTECHNIC UNIV

Vehicle-mounted thermal imaging pedestrian detection RoIs extraction method based on head feature points

ActiveCN111368704AEffective recallPrecise positioningInternal combustion piston enginesScene recognitionIn vehiclePhysical therapy

Owner:SOUTH CHINA UNIV OF TECH

Excited response-based no-reference image quality evaluation method

ActiveCN108171704AThe objective evaluation of quality is goodEase of evaluationImage enhancementImage analysisPattern recognitionComputation complexity

Owner:ZHEJIANG UNIV

In vitro quick breeding method of seedling stem of santal seed embryo

ActiveCN101983557AUse less germ materialHigh reproductive coefficientHorticulture methodsPlant tissue cultureAxillary budCellulose

Owner:DONGGUAN CITY RUISHEN BIOTECH +1

Rice germ separation device

InactiveCN106346523ARealize batch cuttingIncrease production capacityMetal working apparatusEngineeringRice grain

Owner:HARBIN QUANQING TECH SERVICE CO LTD

Motor stator and motor

InactiveCN112436617AEven heat dissipationIncrease powerMagnetic circuit stationary partsWindings conductor shape/form/constructionElectrical conductorElectric machine

Owner:TIANJIN SANTROLL ELECTRIC AUTOMOBILE TECH CO LTD

Masonry filler wall constructional column and construction method thereof

ActiveCN112282123AEasy to adjustAchieve pre-fixationWallsBuilding material handlingArchitectural engineeringStructural engineering

Owner:合力建设有限公司

Power supply circuit of communication bus

ActiveCN107562671AControl output current valueFast chargingVolume/mass flow measurementPower supply for data processingElectrical resistance and conductanceCapacitance

Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD

Spraying process of automobile accessory

InactiveCN110170440AHigh hardnessHigh glossPretreated surfacesCoatingsLacquerSurface cleaning

Owner:天津磊峰实业有限公司

Reset switch assembly and intelligent doorbell using same

InactiveCN113270286AShort response timeEasy to fixElectric switchesElectric/electromagnetic audible signallingDoorbellControl engineering

Owner:深圳市东方迪电子科技有限公司

Automatic lubricating device for welding wire polishing and drawing

PendingCN109442193AImprove the lubrication effectReduce solid impuritiesLubrication containersOil qualityImpurity

Owner:GUIZHOU AEROSPACE NANHAI SCI & TECH

Motor cooling system, motor and vehicle

ActiveCN113162300AImprove cooling effectReliable coolingMagnetic circuit rotating partsElectric machinesElectric machineryCooling effect

Owner:CHINA FIRST AUTOMOBILE

Charging device monitoring control management system based on technology of internet of things

InactiveCN110015082AEffective monitoringEffective control managementCharging stationsIndication of parksing free spacesDevice MonitorParking space

Owner:广州广杰网络科技有限公司

CNT (carbon nano tube) dispersant and preparation method thereof

ActiveCN108102041AGood dispersionSimple preparation processCarbon compoundsCarbon nanotubeMacromonomer

Owner:瑞固新能(上海)材料科技有限公司

Recovery processing method of PET (Polyethylene Terephthalate) polyester and high-strength and high-flexibility polyester fiber

InactiveCN103012758AHigh strengthHigh elongationMonocomponent copolyesters artificial filamentMelt spinning methodsFiberPolyester

Owner:肇庆浚荣非织造材料有限公司

Red wine with anti-oxidation, bowel relaxing and immunity enhancing functions and method for making red wine

ActiveCN104830588AReasonable formulaPromotes relative motionDigestive systemAntinoxious agentsRefluxGrape seed

Owner:JING BRAND

Preparation method of 2-(2'-methyl phenyl)-2-carbonyl acetic acid

InactiveCN103922924ACarboxylic preparation by oxidationAcetic acidPhase-transfer catalyst

Owner:NANJING UNIV OF TECH

Intersection vehicle illegal lane change early warning management and control method and system based on thunder monitoring

PendingCN114283587AGuaranteed accuracyIllegal lane-changing behavior containmentArrangements for variable traffic instructionsSimulationSurveillance camera

Owner:ANHUI DAER INTELLIGENT CONTROL SYST

Preparation method for high-quality paper pulp

InactiveCN106012654AHigh strengthLow costNon-fibrous pulp additionPaper/cardboardFiberRaw material

Owner:SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD

Method for learning geometric decoupling representation based on geometric non-entangled variational automatic encoder

PendingCN113723008AEffective feature representationDesign optimisation/simulationConstraint-based CADAlgorithmTheoretical computer science

Owner:BEIJING UNIV OF POSTS & TELECOMM

Traditional Chinese medicine for treating cervical spondylopathy

InactiveCN106236989ARelieve painLow costSkeletal disorderGnetophyta medical ingredientsSide effectCost effectiveness

Owner:刘洪刚

Vehicle skylight plastic part mold

InactiveCN107283687AEasy to fillInvest evenlyPulleySkylight

Owner:无锡贺邦汽车配件有限公司

Bare die discharging device

ActiveCN103681411AShorten the timeSolid-state devicesSemiconductor/solid-state device manufacturingInterior spaceElectrical and Electronics engineering

Owner:SEMES CO LTD

Method and device for predicting remaining life of mechanical equipment

ActiveCN110415835AImprove accuracyNeural architecturesInformaticsBack propagation neural networkState parameter

Owner:CRRC IND INST CO LTD +1

Page display method and device, electronic equipment and storage medium

InactiveCN112306593AExecution for user interfacesComputer hardwareEngineering

Owner:BEIJING BYTEDANCE NETWORK TECH CO LTD

Preparation method for multi-amino-acid polymer/strontium-containing calcium sulfate composite material

InactiveCN104606719AGood mechanical propertiesGood biocompatibilityProsthesisArtificial bonePhenylalanine

Owner:贺灿辉

Six-point-method horizontal type suspended sand collecting device

InactiveCN106769222AReduce the possibilityAvoid duplication of workWithdrawing sample devicesEngineeringHuman power

Owner:HOHAI UNIV

Selenium-enriched health product

InactiveCN105768079AThe effect of treating qi and blood deficiency is obviousPill deliveryCapsule deliveryActive componentMedicine

Owner:南京多宝生物科技有限公司

Technology for machining separation layer for machining vacuum sintering net

ActiveCN103658649AImprove processing efficiencyImprove processing qualityPowder suspensionStainless steel fiber

Owner:XINXIANG LIER FILTER TECH +1

Double evaporator high-moisture defrosting-free refrigerating room

InactiveCN101149205AReduce frostingIncrease humidityLighting and heating apparatusDefrostingRefrigeration compressorCold air

Owner:SHANDONG INST OF POMOLOGY

Display method and mobile terminal

ActiveCN108415642AImprove experienceInput/output processes for data processingTarget ResponseComputer engineering

Owner:VIVO MOBILE COMM CO LTD

Jig for quantitative measurement of thermal elongation of silica gel rod

InactiveCN108802092ASimple structureReduce manufacturing costMaterial thermal analysisMechanical measuring arrangementsEngineeringSilica gel

Owner:杭沣

Azimuth-elevation tracking method of heliostat with reflecting mirror surface deviated from rotating center

InactiveCN101859014ASimple and accurate tracking methodSolar heating energySolar heat collector controllersElevation angleTarget surface

Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

Door lock control system and control method thereof

InactiveCN103325167AConvenient, quick and safe switchStrong penetrating powerIndividual entry/exit registersMicrocontrollerControl system

Owner:ZHUHAI TIANWEI TECH DEV CO LTD

Method for logging in to program and server

InactiveCN103428159AReduce workloadImprove securityTransmissionApplication serverPassword

Owner:LENOVO (BEIJING) CO LTD

18650 lithium battery thermal runaway chain reaction test method

InactiveCN105974319AThermometers using electric/magnetic elementsElectrical testingEngineeringThermocouple

Owner:CIVIL AVIATION UNIV OF CHINA

Purchase and supply commodity quotation method based on WeChat platform

InactiveCN107358504ASolve the problem of heavy price adjustment workloadImprove logistics procurement modeBuying/selling/leasing transactionsSupply managementEngineering

Owner:JIANGSU KEDA HUIFENG SCI & TECH

Crawler-type traveling body and traveling device

ActiveCN113247130AImprove stabilityMotor depositionEndless track vehiclesDrive wheelDrive shaft

Owner:RICOH KK

Causal relationship extraction method based on BERT semantic enhancement

PendingCN114548117AEfficient managementImprove accuracySemantic analysisNeural architecturesRelationship extractionQuestions and answers

Owner:ANHUI UNIV OF SCI & TECH

Production process of cumquat and lemon mixed not-from-concentration juice

InactiveCN106360201AExtended shelf lifeReduce lossFood scienceFlavorChemistry

Owner:重庆德腾农产品有限公司

Business data processing method and construction method of business data processing system

ActiveCN113256353AImprove accuracyImprove analysis efficiencyResourcesMarket data gatheringData processing systemComputer science

Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

Colloidal gold test strip for detection of Tilletia controversa Kuhn

InactiveCN104931702AHigh potencyHigh affinityMaterial analysisTilletia ayresiiQuality control

Owner:INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI

Construction method capable of controlling uneven-transition-section shield tunnel segment cracking

InactiveCN106150521AGood effectImprove the forceUnderground chambersTunnel liningSlurryInteraction forces

Owner:SHANGHAI LANGZHAO HIGHWAY & RAILWAY MAINTENANCEENG TECH

Valve actuator convenient to mount and dismount and using method thereof

PendingCN114754188AEasy to disassembleEasy to installSnap-action fastenersOperating means/releasing devices for valvesValve actuatorControl engineering

Owner:江苏博特威流体科技有限公司

Multi-sensor target identification algorithm for insect counting

InactiveCN104778494AImprove accuracyImprove stabilityCounting mechanisms/objectsSensor arrayInterference resistance

Owner:北京中科通视科技有限公司

Automatic door opening device and electric appliance

PendingCN112006632ASimple structureFew partsTableware washing/rinsing machine detailsEngineeringStructural engineering

Owner:QINGDAO HAIER DISHWASHER +1

Outer pipe drilling device for polyurethane foaming thermal insulation pipe

InactiveCN108673634AFast drillingEasy to drillMetal working apparatusThermal insulationSlide plate

Owner:WUHU JUNRU THERMAL INSULATION MATERIAL CO LTD

Assembly type mixing station stock bin capable of being used in turnover mode

InactiveCN111946110AReduce generationEasy constructionSunshadesStrutsMechanical engineeringIndustrial engineering

Owner:中铁大桥局第九工程有限公司

Duplex gear pump open type hydraulic system of concrete mixer

InactiveCN104265707ALow cleanliness requirementsSolve the problem that the tank speed cannot meet the use requirementsServomotorsGear pumpFuel tank

Owner:SINOTRUK QINGDAO HEAVY IND

Intelligent control device and intelligent control method

InactiveCN105929738ARealize monitoringRealize the communication connectionProgramme controlComputer controlTransmission protocolTTEthernet

Owner:北京汇路鑫科技有限公司

Two-way privacy protection vehicle-moving contact system and method based on two-dimensional code

InactiveCN106686268APrivacy breachEasy to handleSpecial service for subscribersPrivacy protectionContact system

Owner:中国科学院沈阳计算技术研究所有限公司

Control method and system for intelligent household electrical appliance

InactiveCN105301982AEasy to operate manuallyImprove user experienceComputer controlProgramme total factory controlData informationComputer science

Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1

Method for improving preparation yield of starch-lipid compound

InactiveCN114711412AWide variety of sourcesIncrease added valueFood freezingFood ingredient as encapsulating agentBiotechnologyResistant starch

Owner:TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Small ultra wideband band-notched antenna with controllable second-order notched bandwidth

ActiveCN102969564AReduce widthSmall sizeRadiating elements structural formsUltra-widebandDielectric slab

Owner:广州桑瑞科技有限公司

Steel supporting device

ActiveCN105584820ASimple structureEasy to operateConveyorsConveyor partsSheet steelEngineering

Owner:HUATIAN ENG & TECH CORP MCC

Synthesis method of pharmaceutical intermediate compound containing trifluoromethyl

ActiveCN103965012AOvercome the defect of low yieldChange the reaction environmentCarboxylic acid nitrile preparationOrganic compound preparationArylSynthesis methods

Owner:BTC PHARMA TECH CO LTD

Long noncoding RNA (lncRNA) marker associated with hepatocellular carcinoma, and detection primer and application thereof

ActiveCN109609648AReduced expression levelMicrobiological testing/measurementDNA/RNA fragmentationBiomarker (petroleum)Liver cancer

Owner:TAISHAN MEDICAL UNIV +1

Cast-in-situ house drainage system quasi-industrialized construction method

InactiveCN104846978AImprove the waterproof quality of structuresImprove waterproof qualityDomestic plumbingForms/shuttering/falseworksMachiningToilet

Owner:JIANGSU NANTONG NO 2 CONSTR ENG GRP

Computer program acceleration method and system

ActiveCN103377060AAchieving comprehensive trade-offsFile access structuresProgram loading/initiatingData fileData access

Owner:TENCENT TECH (SHENZHEN) CO LTD +1

Mobile terminal, account number information adding method and account number information inspection method

ActiveCN101247595AEasy to useRadio/inductive link selection arrangementsTelephone set constructionsDatabaseInspection method

Owner:YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD

Microbubble generator for reinforced hydrogenation technology

ActiveCN104874315ASmall pressure dropSimple structureMixing methodsMixersForming gasEngineering

Owner:LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1

Sound control circuit for hearing aid

InactiveCN101009481AEasy to controlAutomatic tone/bandwidth controlCapacitanceElectrical resistance and conductance

Owner:YUKIYONE ELECTRONICS

Air-draft-free totally-closed powder supply center

ActiveCN103008190ANo wasteNo pollution in the processLiquid surface applicatorsCoatingsColor changesAir cavity

Owner:ZHONGSHAN JUNHE ELECTRO MECHANICAL APP

Method for breeding pigs achieving high feed utilization efficiency

ActiveCN108559781AImprove utilization efficiencyLong relief timeMicrobiological testing/measurementPig breedingBreeding pig

Owner:INST OF ANIMAL SCI OF CHINESE ACAD OF AGRI SCI

Kitchen knife with protective device

InactiveCN103737626AAvoid dangerPrevent take outMetal working apparatusMetal-working hand toolsKitchen utensilsEngineering

Owner:马蕾 +4

Negative magnetic conductivity metamaterial

ActiveCN102593593AIncrease capacitanceIncrease inductanceAntennasResonanceMaterials science

Owner:KUANG CHI INST OF ADVANCED TECH

Uplink collaboration multi-point (CoMP) method and system

InactiveCN103312393AImprove the signal-to-interference-noise ratio of the received signalRealize data transmissionSite diversitySpatial transmit diversitySignal-to-noise ratio (imaging)Data transmission

Owner:ZTE CORP

Full-duplex filtering forwarding relay structure and discrete frequency domain response design method thereof

ActiveCN107592149AImprove usabilityReduce complexityRadio transmissionDuplex signal operationFrequency changerComputation complexity

Owner:PEKING UNIV

Suspension type precise adjustment device for poses of multi-layer nested reflector

PendingCN114779428AReduce deformationImprove alignment accuracyMountingsActuatorContact sensor

Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Slotting method used for composite strip

InactiveCN109590361AMetal stripsEngineering

Owner:YIXING HUIHUA COMPOSITE MATERIAL CO LTD

Data structure relinquishing

PendingCN113544639ARegister arrangementsConcurrent instruction executionComputer hardwareComputer architecture

Owner:ARM LTD

Hydraulic lifting consigning device

InactiveCN112249968AImprove shipping efficiencyImprove work motivationLifting framesDrive shaftElectric machinery

Owner:浙江拓邦液压科技有限公司

Building wall perpendicularity detection device and method

ActiveCN113607149AReduce inaccuracyImprove accuracyPhotovoltaic energy generationFixed angles setting outStructural engineeringMeasuring ruler

Owner:广州增城正源建设工程检测中心有限公司

Detachable rolled steel rainproof device with strong clamping function

PendingCN107724718AEasy to disassembleAvoid damageSpecial buildingBuilding constructionsPolyvinyl chlorideEngineering

Owner:TAIZHOU YUXIN HOISTING EQUIP

Group establishment method, access equipment, system and storage medium

ActiveCN112543206AImprove communication qualityAvoid missing initialsBroadcast service distributionTransmissionCommunication qualityTerminal equipment

Owner:CHENGDU TD TECH LTD +1

Novel concrete composite moisturizing curing film

InactiveCN113024276AReduce workloadImprove sprinkling efficiencyWater sourceWater resources

Owner:臧有辉

Electrostatic flocking paste and preparation method thereof

InactiveCN109400795AModerate viscosityImprove adhesionFibre treatmentFiberSulfite salt

Owner:浙江佳润新材料有限公司

Cold bolt installer

PendingCN114012662AImprove the success rate of installationReduce the difficulty of operationMetal working apparatusMetal-working hand toolsEngineeringStructural engineering

Owner:AVIC SAC COMML AIRCRAFT

Air conditioner, and control method and control device for outdoor fan in air conditioner

InactiveCN104913447AGuaranteed uptimeAvoid problems such as poor oil return conditionMechanical apparatusSpace heating and ventilation safety systemsEngineeringOutdoor temperature

Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Alkali ash crystallization and filtering system

ActiveCN105129821AReduce dust accumulationReduce foulingAlkali metal sulfite/sulfate purificationSodium sulfateImpurity

Owner:武汉凯比思电力设备有限公司

Ultraviolet sterilization water channel for water treatment and sterilization method thereof

InactiveCN107601614AShort sterilization distanceSimple control systemWater/sewage treatment by irradiationWater channelControl system

Owner:温志军

Manufacturing method for single pile of wind driven generator

InactiveCN105274983AQuality assuranceEnsure durabilityBulkheads/pilesEngineeringRobot hand

Owner:张永赞

High-warning offshore energy-saving buoy

ActiveCN112193367AImprove warning effectEasy to seeWaterborne vesselsBuoysSea wavesBuoy

Owner:温州拓日工业设计有限公司

Composition for preventing and treating liver diseases, preparation method and application of composition

InactiveCN113288957AGood treatment effectEffective treatmentDigestive systemPlant ingredientsHepatic inflammationSchisandra propinqua

Owner:杨启军 +2

Task-level out-of-order multi-issue scheduler and scheduling method thereof

ActiveCN104932945AImprove utilization efficiencyGood computing powerResource allocationReservation stationManagement unit

Owner:HEFEI UNIV OF TECH

Solid state disk high-speed storage system based on SATA interface

InactiveCN113126880AImprove reliabilityImprove general performanceInput/output to record carriersElectrical connectionEngineering

Owner:XIAN KEYWAY TECH

Construction method of recombinant novel coronavirus spike protein receptor binding region type 9 adeno-associated virus

ActiveCN112608908APrevent widespread infectionLong-term effective immune protectionSsRNA viruses positive-senseViral antigen ingredientsCoronavirus vaccinationReceptor

Owner:NAT INST FOR FOOD & DRUG CONTROL

Cloud bridge, on-cloud service system and under-cloud system

PendingCN112702250APrevent crashImprove reliabilityUser identity/authority verificationNetworks interconnectionMessage queueCommunication quality

Owner:上海淘票儿信息科技有限公司

Method and device for replacing mine hoisting ropes

ActiveCN102849587AImprove work efficiencyImprove securityMine liftsEngineeringWinch

Owner:徐州市三森威尔矿山科技有限公司

Method for synthesizing modified manganese dioxide nanometer material compound acrylic ester type oil-absorptive resin

InactiveCN102807646AHigh oil absorption rateImprove thermal stabilityMicrowave radiometryBenzoyl peroxide

Owner:YANSHAN UNIV

Gas path diagram implementation method and device based on IAP platform

PendingCN112749425ATimely changeImprove reusabilityGeometric CADConfiguration CADAlgorithmTarget control

Owner:BEIJING NAURA MICROELECTRONICS EQUIP CO LTD

Consumption data pushing method and device

PendingCN114840758AImprove consumption convenienceAvoid situations that are not easy to detectFinanceSemantic analysisBusiness enterpriseComputer science

Owner:BANK OF CHINA

Improved REI equivalence-based grid adjustment current limitation method

ActiveCN107317326AAvoid experientialPersuasiveAc network circuit arrangementsCurrent limitingEngineering

Owner:CHINA THREE GORGES UNIV

Environment-friendly concrete anti-freezing agent

InactiveCN107954629AReduce usageImprove workabilitySuperplasticizerPhosphogypsum

Owner:RIZHAO FEM NEW MATERIAL TECH

Direct transmission group air tightness detection mechanism

ActiveCN110763408AGuarantee product qualityCompact structureMeasurement of fluid loss/gain rateWasherAir tightness

Owner:深圳市睿荔科技有限公司

General view test device and general view test method

InactiveCN1825099AShorten the timeImprove inspection resolutionMaterial analysis using wave/particle radiationMaterial analysis by optical meansVisual inspectionEngineering

Owner:DAINIPPON SCREEN MTG CO LTD

Electronic device

InactiveCN104238628AImprove convenienceDigital data processing detailsTablet computerEngineering

Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1

Safety helmet manufacturing process

InactiveCN109757816AThere will be no deformationTightly boundHelmetsManufacturing engineering

Owner:XIAMEN KEENTECH COMPOSITE TECH CO LTD

Method for purifying synthetic diamond

ActiveCN108190883AAccelerate gas phase oxidation reactionImprove absorbing performanceDiamondMicrowaveWorking environment

Owner:ZHENGZHOU UNIVERSITY OF AERONAUTICS +1

Light-response polymer microgel particle and preparation method thereof

ActiveCN104829779AFast and reversible adjustmentStable in naturePolymer scienceIsomerization

Owner:NINGBO UNIV

Gray level image median filtering optimizing method based on FPGA and system thereof

InactiveCN107341772AProcessing speedSave resourcesImage enhancementComputer visionField-programmable gate array

Owner:HARBIN INST OF TECH

Plastic bottleneck trimming device

PendingCN109263024AReduce laborImprove work efficiencyHydraulic cylinderEngineering

Owner:开平市庆丰塑料制品有限公司

Post-combustion fuel injection control systems and methods

InactiveCN102235259AElectrical controlInternal combustion piston enginesEnergy rateLoss rate

Owner:GM GLOBAL TECH OPERATIONS LLC

Magnetic control key cylinder and magnetic control key for safety padlock and grading control system of magnetic control key cylinder and magnetic control key

InactiveCN105178713AAvoid lossEasy to unlockNon-mechanical controlsKeysControl systemControl engineering

Owner:YUEQING GONGCHUANG ELECTRIC CO LTD