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.

Traditional Chinese medicine feed for medicated chickens and breeding method

InactiveCN107836417AAvoid harmGood for healthAnimal feeding stuffAntibiotic YTherapeutic effect

Owner:李莉

Novel kebab threading mechanism

InactiveCN107624852AEfficient use ofReduces subsequent separation stepsMeat processing devicesEngineeringMechanical engineering

Owner:SICHUAN JINYING TECH CO LTD

Method for manufacturing semiconductor device

PendingCN114823711ASolid-state devicesSemiconductor/solid-state device manufacturingBit lineDevice material

Owner:TAIWAN SEMICON MFG CO LTD

Slow-release material taking traditional Chinese medicine waste as raw material, slow-release fertilizer and preparation method thereof

PendingCN112645754ALow costImprove performanceCalcareous fertilisersAlkali orthophosphate fertiliserPotassium persulfateAgricultural engineering

Owner:GANSU UNIV OF CHINESE MEDICINE

VR equipment suspension frame with guiding wheel

InactiveCN107906325AImprove stabilityPrevent trippingStands/trestlesCable harnessFastener

Owner:ANHUI AOZI INFORMATION TECH CO LTD

Profiled steel sheet structure for roofs

InactiveCN103291005AAvoid wastingFactors that reduce the varietyRoof covering using slabs/sheetsSheet steelEngineering

Owner:GUANGZHOU UNION STEEL BUILDINGS

Driving apparatus and driving method therefor

InactiveCN105411810AChiropractic devicesNon-surgical orthopedic devicesIndex fingerEngineering

Owner:SEIKO EPSON CORP

Neural-network-based hot spot data prediction method and system

InactiveCN107292388AImprove user experienceImprove utilization efficiencyNeural learning methodsMemory systemsData setNetwork model

Owner:ZHENGZHOU YUNHAI INFORMATION TECH CO LTD

Method for screening G-quadruplex ligand based on DNA silver nano-cluster homogeneous phase

InactiveCN104694633AGrowth inhibitionSimple and fast operationMicrobiological testing/measurementChinese traditionalScreening method

Owner:SHAANXI NORMAL UNIV

Anorectal pipe nursing device

InactiveCN108499989AImprove nursing efficiencyNo secondary infectionHollow article cleaningSuperinfectionEngineering

Owner:王卫华

Multiband passive synthetic aperture imaging system

InactiveCN102004248AReduce the numberMulti-field spatial frequency sampling pointsRadio wave reradiation/reflectionUltra-widebandIntermediate frequency

Owner:BEIHANG UNIV

Method for simultaneously recovering copper and sulfur from tin refining sulfur slag through oxygen pressure leaching

ActiveCN111560525ATake advantage ofEfficient separationProcess efficiency improvementCopper sulfatesPtru catalystIron powder

Owner:YUNNAN TIN CO LTD TIN BRANCH

Pulse type bladder blood clot flushing and negative pressure drainage integrated device

PendingCN111921030AGood for postoperative recoveryAdjustable pulse intervalEnemata/irrigatorsMedical devicesUrinary catheterBladder blood clots

Owner:昆明医科大学第二附属医院

Information processing method and device executed by firewall

ActiveCN111147520ANetworks interconnectionData packInformation processing

Owner:BEIJING QIANXIN TECH +1

Ganoderma lucidum black tea processing technology

InactiveCN104970140AShape effectFlat shapePre-extraction tea treatmentBlack teaBlood sugar

Owner:詹聪

Formula milk powder assisting in conditioning health of people suffering from hypertension, hyperlipidemia and hyperglycemia

InactiveCN103549016AGood for healthImprove repair functionMilk preparationAcute hyperglycaemiaWhey protein powder

Owner:BEIJING SANLIYUAN FOOD TRADING

Casing detection device and sausage filling device

PendingCN109169803APrevent overflowSimple structureMeasurement devicesSausage filling/stuffing machinesElectricityCase detection

Owner:佛山市奥楷机械科技有限公司

Disc seat of clothes dryer and clothes dryer

ActiveCN108797053AReduce manufacturing costReduce workloadTextiles and paperLaundry driersEngineeringMechanical engineering

Owner:QINGDAO HAIER WASHING MASCH CO LTD +1

Polymer emulsion type defoaming agent and preparation method thereof

PendingCN111484630AImprove hydrophilicityHydrophilicity adjustableDefoamers additionFoam dispersion/preventionPolymer sciencePtru catalyst

Owner:JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD +1

Portable terminal and pulse detection method

InactiveCN110604558ASensorsMeasuring/recording heart/pulse rateTransducerComputer terminal

Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Image acquisition method and device

InactiveCN110071961ATelevision system detailsColor television detailsThe InternetComputer terminal

Owner:徐戈

Porous base layer construction method of light-load road

InactiveCN109505209APermeableGood porosity stabilityRoadwaysRoad engineeringCrushed stone

Owner:HUBEI UNIV OF ARTS & SCI

Network service control method and communication equipment

ActiveCN110971641ABroaden service areasGuarantee Security RequirementsAssess restrictionTransmissionService controlNetwork service

Owner:VIVO MOBILE COMM CO LTD

Connecting structure of impeller and gear shaft

InactiveCN102777424AGuaranteed installation locationSimple structurePump componentsPumpsImpellerMachining

Owner:WUXI GL TUBRO COMPRESSOR

Garbage disposal big data tracking, collecting and displaying system

PendingCN113891035AConvenience and rational planning of work arrangementsCo-operative working arrangementsClosed circuit television systemsData informationData acquisition

Owner:付振罗

Method, system and device for adjusting motor operation based on temperature and storage medium

PendingCN114337423AEliminate the effects ofImprove performanceElectronic commutation motor controlElectric motor controlElectrical resistance and conductanceThermodynamics

Owner:GREE ELECTRIC APPLIANCES INC +1

In-situ passive sampler for wetland

InactiveCN105865848ASufficient multi-dimensional spatial distribution informationFlexible sampling periodWithdrawing sample devicesSoil scienceEnvironmental engineering

Owner:INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI

Manufacturing method for voice coil framework material

InactiveCN102427571AHigh temperature resistantCorrosion resistanceElectrical transducersGlass fiberFiber

Owner:杨隆雨 +1

Novel flat plate display detection clamping and positioning circuit connection clamp

InactiveCN113146512AAchieve clampingImprove stabilityWork holdersMechanical engineeringPhysics

Owner:周劲松

Fragile product packaging device, assembly and method

ActiveCN106976649AEasy to fixEasy to useDamagable goods packagingCushioningBiomedical engineering

Owner:SF EXPRESS

Track structure of transport device for mounting of transformer

ActiveCN107554569AEasy to moveInductances/transformers/magnets manufactureHand carts with multiple axesTransformerEngineering

Owner:钱泽袁

Ultra-low surface density and high open porosity foam nickel and production method thereof

InactiveCN106757183AHigh porosityChange structureElectroforming processesPorosityPower battery

Owner:CHANGDE LYRUN MATERIAL

Bluetooth control method, device and system for physical equipment and relevant equipment

InactiveCN107180525ASolve problems such as poor experienceImprove work experienceSub-station arrangementsTransmission systemsComputer terminalComputer science

Owner:北京信安世纪科技股份有限公司

Production method of hot-rolled round steel for annealing-free low-hardness spring

InactiveCN112301279AReduced Hardenability CapabilityReduce internal stressMetal rolling arrangementsTemperature controlHeat conservation

Owner:SHIJIAZHUANG IRON & STEEL

Shooting method and device, electronic equipment and storage medium

ActiveCN112367462AAvoid CatonGuaranteed clarityTelevision system detailsColor television detailsAlgorithmImage resolution

Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

Particulate matter optical thickness remote sensing monitoring method used in urban area

InactiveCN103954974AImprove stabilityImprove consistencyElectromagnetic wave reradiationICT adaptationParticulatesStructure function

Owner:SHANDONG UNIV OF SCI & TECH

Mold facilitating quick demolding of concrete block

ActiveCN110666939AEasy to demouldEasy to jack upDischarging arrangementMouldsCamPipe

Owner:成都市恒辉商品混凝土有限责任公司

Electrical appliance control system and method

InactiveCN105527847ARealize remote controlRealize monitoringComputer controlProgramme total factory controlElectricityControl system

Owner:徐智慧

Maintenance construction equipment for rust removal and fastening of rail

InactiveCN112301814AImprove working conditionProtect life safetyRailway track constructionPolishingArchitectural engineering

Owner:杭州刚方机械科技有限公司

Bulging test equipment for aluminum electrolytic capacitor

ActiveCN114578178AImprove the safety of useTag implementationElectrical testingUsing fluid meansElectrolytic agentEngineering

Owner:南通市斯克罗螺丝制造有限公司

Carpet cleaning agent and preparation method thereof

InactiveCN103387887AImprove decontamination abilityEasy to cleanInorganic/elemental detergent compounding agentsNon-ionic surface-active compoundsSodium phosphatesPhenyl Ethers

Owner:TIANJIN CHEM REAGENT RES INST

Underwater high-simulation robotic fish mechanism and system

ActiveCN105059511ABeautiful swimmingSimple structurePropulsive elements of non-rotary typeTransmission with mechanical gearingElectric machineryEngineering

Owner:中科步思德(洛阳)智控科技有限公司

Novel juicing machine

ActiveCN102327046AAvoid easy cloggingReduce waiting timeStrainersDischarge efficiencyEngineering

Owner:KINGCLEAN ELECTRIC

Application programming interface enabling communication features for different communication protocols

ActiveCN104580137AAutomatic exchangesTransmissionWebSocketApplication programming interface

Owner:AVAYA INC

Test method of concrete-filled steel tube test piece with middle corrosion

ActiveCN113466121AEasy to prepareFast corrosionWeather/light/corrosion resistanceNuclear energy generationRubber ringAspirator

Owner:SHIJIAZHUANG TIEDAO UNIV

Highway guardrail

ActiveCN108867469AShorten speedFunction as a warningRoadway safety arrangementsRoad surfaceEngineering

Owner:东阳市善水环境工程有限公司

Recipe processing method and device, server and storage medium

PendingCN111178159AHigh feasibilityImprove experienceDigital data information retrievalCharacter and pattern recognitionProcess engineeringComputer science

Owner:GREE ELECTRIC APPLIANCES INC +1

Janus-gradient composite wettability copper wire capable of achieving ultra-fast transmission of liquid drops and preparation method of Janus-gradient composite wettability copper wire

PendingCN114250457ASimple processImprove controllabilityMaterial nanotechnologyMetallic material coating processesFluid phaseAlcohol

Owner:BEIHANG UNIV

Dust collector

ActiveCN102824140ASimple structureLower the altitudeMotor fan assembly mountingEngineeringDust collector

Owner:NINGBO JINLONG ELECTRIC APPLIANCE

A sizing control method for large round bars

ActiveCN105751009BEliminate measurement errorsGood effectMeasurement/indication equipmentsMeasurement deviceMeasurement point

Owner:SHANDONG IRON & STEEL CO LTD

Humanoid five-finger manipulator

InactiveCN109927062AGripping headsDegrees of freedomSelf locking

Owner:BEIJING UNIV OF CHEM TECH

Quick efficient eggbeater

InactiveCN108378728AReduce vibration frequencyReduce noiseHolders and dispensersKitchen equipmentWorking environmentMechanical energy

Owner:林栋

QoS restricting multicast routing method based on Steiner

InactiveCN1731762ALow costModerate complexityData switching networksReal-time computingTime delayed

Owner:WUHAN UNIV OF TECH

Heating device

InactiveCN106595029AIncrease the resistance valueImprove heating efficiencyWater heatersElectrical resistance and conductanceLiquid medium

Owner:CHUANGYIMIX TECH CO LTD

Smart switch socket

PendingCN109936028AWith wireless communication capabilitySolve the problem of forgetting to turn off the switch socketCouplings bases/casesFlexible/turnable line connectorsKey pressingSmart switch

Owner:深圳市茂普智能科技有限公司

Modular heating system of heat pump and variable frequency water pump control method

InactiveCN110986139AMeet needsRealize energy-saving controlLighting and heating apparatusEfficient regulation technologiesProcess engineeringHeating system

Owner:GREE ELECTRIC APPLIANCES INC

Method for early spring cultivation of fruit cucumbers in greenhouse

InactiveCN105850638AIncrease productivityIncrease productionGrowth substratesCulture mediaGreenhouseSite management

Owner:HEXIAN TIANHAO VEGETABLE GROWING FAMILY FARM

Intelligent remote medical system

PendingCN111477345AConvenient treatmentImprove experienceMedical communicationReservationsComputer networkEngineering

Owner:四川君德利远程医疗科技有限公司

Coating, and preparation method and application thereof

InactiveCN110724425AImprove adhesionExcellent surface hardnessAntifouling/underwater paintsPaints with biocidesBenzeneO-Phosphoric Acid

Owner:广东顺德佑力科技有限公司

Oil-braised crayfish and preparation method thereof

InactiveCN109549115AImprove taste effectImprove securityNatural extract food ingredientsRapeseedShiitake mushrooms

Owner:海南海岛八号餐饮管理有限公司

Method, system and equipment for detecting center point offset of high-voltage transmission tower

PendingCN114061512AMeasurement devicesTransmission towerControl theory

Owner:GUANGDONG POWER GRID CO LTD +1

Electric power steering controller with connector clip

InactiveCN105059374AAvoid enteringTo prevent the reversed situationCircuit arrangements on support structuresCasings/cabinets/drawers detailsElectric power steeringHeat conducting

Owner:CHONGQING LONGRUN AUTOMOBILE STEERING GEARS

Air supply system experiment device for proton exchange membrane fuel cell for automobile

InactiveCN104993161AQuick matchQuick verificationFuel cell auxillariesSolid electrolyte fuel cellsCombined useIntercooler

Owner:TONGJI UNIV

Voltage transformer ferromagnetic resonance experimental method

InactiveCN108459285AEasy to detectEasy to exportMagnetic property measurementsCapacitanceExperimental methods

Owner:WUHAN ORIG TECH CO LTD

Test device for vehicle side rolling test with adjustable slope

PendingCN109556887AResolving time-consuming and labor-intensive situationsVehicle testingSteel frameMechanical engineering

Owner:TIANJIN UNIV OF COMMERCE

Method for discussing main control factors of permeability of tight sandstone reservoir

ActiveCN108959723AClimate change adaptationDesign optimisation/simulationThroatRock core

Owner:NORTHEAST GASOLINEEUM UNIV +1

Feed for geese and preparation method therefor

InactiveCN105192353AReasonable ratioImprove protectionAnimal feeding stuffRespiratory disorderWaxAloe arborescens

Owner:ZHONGSHAN GREENTA ELECTRONICS TECH

Lane grass based on zero-adhesive environment-friendly process

PendingCN112709107ARealize splicingAchieve installationGround pavingsAdhesiveAgricultural engineering

Owner:NINGBO GREEN LINK NEW MATERIAL TECH CO LTD

Method for injecting bile acid into embryo eggs for improving growth of hatched chicks

InactiveCN107173262APromote muscle developmentPromote growthAvicultureBiologyBile acid

Owner:SOUTH CHINA AGRI UNIV

Lifting seat capable of accommodating articles

PendingCN111820652AEasy to storeComfortable to useStoolsAdjustable chairsHydraulic cylinderTemperature control

Owner:佛山市顺德区东鑫家具有限公司

Consulting system of optimized education of college applying chances

InactiveCN104574234AEfficient sharingData processing applicationsDatabase serverComputer science

Owner:THINKTANK LEARNING

Globe provided with magnifier

InactiveCN105608983ASee clearlyPlanetaria/globesEngineering

Owner:ZHUGELIANG MIDDLE SCHOOL

Stirring ultrasonic degassing device for geothermal recharge water

PendingCN113998753AUniform irradiationWell mixedTransportation and packagingRotary stirring mixersExhaust valveUltrasonic irradiation

Owner:中核坤华能源发展有限公司 +1

Small loading machine

InactiveCN107326946AReduce usage limitationsShorten the lengthMechanical machines/dredgersDrive shaftThrough transmission

Owner:张能

Preparation method of environment-friendly polyurethane waterproof coating

InactiveCN114028980AAvoid loose connectionsImprove cleaning efficiencyRotary stirring mixersTransportation and packagingProcess engineeringCleaning methods

Owner:潍坊市宇虹防水材料(集团)有限公司

Automatic production equipment for graphene far-infrared electrothermal film

PendingCN108882410AImprove the safety of useReduce tensionOhmic-resistance heatingTemperature controlSpray nozzle

Owner:青岛在宇工贸有限公司

Method for testing resistance of battery diaphragm

PendingCN109031128AStable detectionAccurate measurementElectrical testingTest batteryPole piece

Owner:SHANGHAI ENERGY NEW MATERIALS TECH CO LTD

Sucking disc

InactiveCN107725570AAvoid breakingNot easy to damageSuction cupsContact pressureEngineering

Owner:颜茹玉

Full-automatic flange welding machine

ActiveCN106862827AAchieve positioningRealize automatic feedingWelding/cutting auxillary devicesAuxillary welding devicesAutomatic testingFlange

Owner:FOSHAN NANHAI GUANGDONG TECH UNIV CNC EQUIP COOP INNOVATION INST +1

Fast wide satellite SAR geocoding method

ActiveCN102129066ASolve the problem that needs to set the initial valueReduce input interfaceRadio wave reradiation/reflectionSynthetic aperture radarImaging algorithm

Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI

Environment-friendly adhesive for artificial board and preparation method of environment-friendly adhesive

InactiveCN104387992AEnvironmentally friendlySafeNon-macromolecular adhesive additivesMacromolecular adhesive additivesSodium phosphatesOperability

Owner:SUZHOU YIAIFU CHEM MATERIAL TECH

Harmless inspecting method

InactiveCN1410767AAnalysing solids using sonic/ultrasonic/infrasonic wavesWelding/cutting auxillary devicesEngineeringFriction stir welding

Owner:HITACHI LTD

Roller type gum brush

InactiveCN104401039AInhibit sheddingImprove reliabilityBox making operationsPaper-makingBristleEngineering

Owner:DINGSHENG CORP

Battery balancer using multi-winding transformer

InactiveCN108964195AAutomatic Core ResetEfficient use ofCharge equalisation circuitElectric powerMOSFETSwitching signal

Owner:CENT SOUTH UNIV

Door and window with an induction type finger pinch device

InactiveCN101586432APower-operated mechanismSpecial door/window arrangementsFixed frameInductor

Owner:FUJIAN YONGTAI CONSTR ENG CO +1

Method for preparing decane dialdehyde intermediate

ActiveCN111943819AHigh selectivityLess discharge of three wastesOrganic chemistryPhysical/chemical process catalystsMolecular sieveMicroreactor

Owner:WANHUA CHEM GRP CO LTD

Full-automatic laser carving machine

InactiveCN102343756AImprove pass rateSimple processModel makingEngravingMarine engineeringMachining system

Owner:SHENZHEN QIAOHUI PRECISION MACHINERY

Efficient hot-air engine

InactiveCN102032068ASimple structureImprove efficiencyHot gas positive displacement engine plantsLow noiseDetonation

Owner:靳北彪

Producing apparatus and method for packing part

InactiveCN1509862AEnvelopes/bags making machineryBoxes/cartons making machineryCardboardEngineering

Owner:GD SPA

Natural product separation method with improved separation efficiency

InactiveCN107823913AImprove separation efficiencyRelease fullySolid solvent extractionDecompositionBULK ACTIVE INGREDIENT

Owner:成都华田生物技术有限公司

Joint harmless treatment apparatus of waste rolling oil and oil-bearing waste diatomite

ActiveCN108531203AAvoid crackingAvoid carbonizationLiquid hydrocarbon mixture productionSpecial form destructive distillationBoiling pointCollection system

Owner:KUNMING METALLURGY INST

Method for synchronously preparing silicon nitride and aluminum-iron-calcium-basedflocculating agent by utilizing fly ash and product thereof

ActiveCN113003684AEasy to makeNitrogen compoundsSolid waste managementPhysical chemistryLow temperature plasma

Owner:CHANGSHU INSTITUTE OF TECHNOLOGY

Tether retracting and switching control system for space object towing, and method thereof

InactiveCN109597332AImprove reliabilityMeets the demands of low tension towing tasksProgramme controlComputer controlHandoff controlControl signal

Owner:SHANGHAI AEROSPACE SYST ENG INST

Light-color heat-conducting thermoplastic resin and preparation method thereof

ActiveCN112080121AImprove heat resistanceReduce usageHeat-exchange elementsPolymer scienceIndustrial machine

Owner:JIANGSU KINGFA SCI & TECH ADVANCED MATERIALS CO LTD +1

Fluorescent display tube

InactiveCN101504904AIncrease display areaImage/pattern display tubesFluorescenceSemiconductor

Owner:FUTABA CORPORATION

Bottle cap capable of quantitatively pouring out liquid and application method thereof

PendingCN107041842AAvoid wastingAvoid pollutionPharmaceutical containersMedical packagingBottle capPhysics

Owner:GUIZHOU UNIV

Day-ahead market clearing method and system giving consideration to economy and fairness

PendingCN114119095AImprove economyMarket predictionsInformation technology support systemElectricity marketPower system scheduling

Owner:POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD

Parking time period recommendation method and device

PendingCN114417167ADigital data information retrievalSpecial data processing applicationsEngineeringData mining

Owner:QINGDAO HISENSE TRANS TECH

Maleic anhydride-grafted compatibilizer and its preparation method, and polytetrafluoroethylene composite

InactiveCN106632868AEfficient compositeHigh tear strengthCoatingsTetrafluoroethylenePolymer science

Owner:LANZHOU UNIVERSITY OF TECHNOLOGY +1

Method for grading treatment of manganese-containing waste acid

ActiveCN109836002AWater contaminantsMultistage water/sewage treatmentThermal insulationManganese

Owner:THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH

Mixed-pressing PCB degumming process

ActiveCN112165772AImprove degumming effectPrinted circuit manufacturePolymer scienceEngineering

Owner:DONGGUAN SHENGYI ELECTRONICS

Method of accurately measuring temperature of food in cookware on gas stove

ActiveCN110925804AAvoid interferenceLow costDomestic stoves or rangesLighting and heating apparatusThermodynamicsEngineering

Owner:NINGBO FOTILE KITCHEN WARE CO LTD

Integrated updating method of LNG (Liquefied Natural Gas) ship power system

ActiveCN106081040AIncrease usageReduce the intensity of transformationPropulsion based emission reductionPower plants being motor-drivenNacelleDouble-walled pipe

Owner:江苏鸿运绿色能源有限公司 +1

State-of-charge balancing method for multi-branch parallel grid-connected battery energy storage system

ActiveCN113013938AState of charge SOC equalizationMaximum capacity attenuationFlexible AC transmissionCircuit monitoring/indicationState of healthControl theory

Owner:ZHEJIANG DAYOU IND CO LTD HANGZHOU SCI TECH DEV BRANCH CO +2

Handheld hydraulic tool

ActiveCN105922203AReduce volumeSmall footprintPortable power-driven toolsInlet channelReturn channel

Owner:CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP

Rotational flow microporous filter

ActiveCN1958114AReduce pollutionAvoid depositionFiltration circuitsNon-miscible liquid separationCycloneSewage

Owner:DAQING OILFIELD CO LTD +1

Method for simultaneous removing oil and salt in rock core

ActiveCN101397908AReduce consumptionLow toxicityPreparing sample for investigationBorehole/well accessoriesBenzeneRock core

Owner:PETROCHINA CO LTD +1

Phase-transition buoyancy adjustment device utilizing residual heat of reactor

ActiveCN109733573AAvoid pump noise problemsImprove concealmentUnderwater vesselsUnderwater equipmentEnergy supplyEngineering

Owner:CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)

Desulfurization and deoxidation process for smelting stainless steel in small-capacity AOD (Argon Oxygen Decarburization) furnace by double-slag process

ActiveCN102560001AReduce lossCaloric satisfactionDouble phaseSlag

Owner:HAIYAN ZHONGDA METAL ELECTRONIC MATERIAL CO LTD