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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 39007-2020 |
Specification of motion control for indusTrial robots used in programmable controllers 基于可编程控制器的工业机器人运动控制规范 |
China National Standards Tri |
 English PDF |
| GB/T 23004-2020 |
Reference architecture for integration of informatization and indusTrialization ecosystem 信息化和工业化融合生态系统参考架构 |
China National Standards Tri |
English PDF |
| GB/T 23005-2020 |
Integration of informatization and indusTrialization management systems—Consulting service guidance 信息化和工业化融合管理体系 咨询服务指南 |
China National Standards Tri |
English PDF |
| GB/T 24549-2020 |
Fuel cell elecTric vehicles—Safety requirements 燃料电池电动汽车 安全要求 |
China National Standards Tri |
English PDF |
| GB/T 20818.12-2020 |
IndusTrial-process measurement and control—Data structures and elements in process equipment catalogues—Part 12：Lists of properties (LOPs) for flow measuring equipment for electronic data exchange 工业过程测量和控制 过程设备目录中的数据结构和元素 第12部分：流量测量设备电子数据交换用属性列表（LOPs） |
China National Standards Tri |
English PDF |
| GB/T 20818.21-2020 |
IndusTrial-process measurement and control—Data structures and elements in process equipment catalogues—Part 21: List of properties (LOP) for automated valves for electronic data exchange—Generic structures 工业过程测量和控制 过程设备目录中的数据结构和元素 第21部分：自动阀电子数据交换用属性列表(LOP) 通用结构 |
China National Standards Tri |
English PDF |
| GB/T 15675-2020 |
Continuously electrolytically zinc/zinc-nickel alloy coated steel sheet and sTrip 连续电镀锌、锌镍合金镀层钢板及钢带 |
China National Standards Tri |
English PDF |
| GB 9706.205-2020 |
Medical elecTrical equipment—Part 2-5: Particular requirements for the basic safety and essential performance of ultrasonic physiotherapy equipment 医用电气设备 第2-5部分：超声理疗设备的基本安全和基本性能专用要求 |
China National Standards Tri |
English PDF |
| GB 9706.206-2020 |
Medical elecTrical equipment—Part 2-6: Particular requirments for the basic safety and essential performence of microwave therapy equipment 医用电气设备 第2-6部分：微波治疗设备的基本安全和基本性能专用要求 |
China National Standards Tri |
English PDF |
| GB 39177-2020 |
Minimum allowable values of energy efficiency and energy efficiency grades for elecTric pressure cookers 电压力锅能效限定值及能效等级 |
China National Standards Tri |
English PDF |
| GB/T 4214.2-2020 |
Test method for noise of household and similar elecTrical appliances—Particular requirements for vacuum cleaners 家用和类似用途电器噪声测试方法 真空吸尘器的特殊要求 |
China National Standards Tri |
English PDF |
| GB/T 4214.4-2020 |
Test method for noise of household and similar elecTrical appliances—Particular requirements for washing machines and spin extractors 家用和类似用途电器噪声测试方法 洗衣机和离心式脱水机的特殊要求 |
China National Standards Tri |
English PDF |
| GB/T 4214.7-2020 |
Test method for noise of household and similar elecTrical appliances—Particular requirements for tumbler dryers 家用和类似用途电器噪声测试方法 滚筒式干衣机的特殊要求 |
China National Standards Tri |
English PDF |
| GB/T 147-2020 |
UnTrimmed sizes of printing, writing and drawing paper 印刷、书写和绘图用原纸尺寸 |
China National Standards Tri |
English PDF |
| GB/T 26790.4-2020 |
IndusTrial wireless networks WIA specification—Part 4: WIA-FA protocol conformance test specification 工业无线网络WIA规范 第4部分：WIA-FA协议一致性测试规范 |
China National Standards Tri |
English PDF |
| GB/T 38846-2020 |
Smart factory—IndusTrial automation systems engineering role class libraries 智能工厂 工业自动化系统工程描述类库 |
China National Standards Tri |
English PDF |
| GB/T 38847-2020 |
Intelligent factory—Technical requirements for indusTrial control abnormal monitoring instrument 智能工厂 工业控制异常监测工具技术要求 |
China National Standards Tri |
English PDF |
| GB/T 38852.1-2020 |
IndusTrial-process measurement, control and automation—Evaluation of system properties for the purpose of system assessment—Part 1: Terminology and basic concepts 工业过程测量控制和自动化 系统评估中系统特性的评定 第1部分：术语和基本概念 |
China National Standards Tri |
English PDF |
| GB/T 38852.2-2020 |
IndusTrial-process measurement, control and automation—Evaluation of system properties for the purpose of system assessment—Part 2: Assessment methodology 工业过程测量控制和自动化 系统评估中系统特性的评定 第2部分：评估方法学 |
China National Standards Tri |
English PDF |
| GB/T 38868-2020 |
IndusTrial control network general technical requirements—Wired networks 工业控制网络通用技术要求 有线网络 |
China National Standards Tri |
English PDF |
| GB/T 38871-2020 |
General specifications of mobile manipulator hybrid robots for indusTrial environment 工业环境用移动操作臂复合机器人通用技术条件 |
China National Standards Tri |
English PDF |
| GB/T 38872-2020 |
Communication architecture of indusTrial robot and production environment 工业机器人与生产环境通信架构 |
China National Standards Tri |
English PDF |
| GB/T 38935-2020 |
On-orbit radiomeTric characteristics assessment for optical imaging remote sensor—VIS-SWIR 光学遥感器在轨成像辐射性能评价方法 可见光-短波红外 |
China National Standards Tri |
English PDF |
| GB/T 39042-2020 |
Measurement of the magnetic properties of elecTrical steels by means of a single sheet tester—H-coil method 电工钢单片磁性能测试 H线圈法 |
China National Standards Tri |
English PDF |
| GB/T 39064-2020 |
Guideline for brand cultivation—IndusTrial cluster 品牌培育指南 产业集群 |
China National Standards Tri |
English PDF |
| GB/T 38943.1-2020 |
Earth-moving machinery—ElecTrical safety of machines utilizing electric drives and related components and systems—Part 1: General requirements 土方机械 使用电力驱动的机械及其相关零件和系统的电安全 第1部分：一般要求 |
China National Standards Tri |
English PDF |
| GB/T 38943.2-2020 |
Earth-moving machinery—ElecTrical safety of machines utilizing electric drives and related components and systems—Part 2:Particular requirements for externally-powered machines 土方机械 使用电力驱动的机械及其相关零件和系统的电安全 第2部分：外部动力机器的特定要求 |
China National Standards Tri |
English PDF |
| GB/T 38943.3-2020 |
Earth-moving machinery—ElecTrical safety of machines utilizing electric drives and related components and systems—Part 3:Particular requirements for self-powered machines 土方机械 使用电力驱动的机械及其相关零件和系统的电安全 第3部分：自行式机器的特定要求 |
China National Standards Tri |
English PDF |
| GB/T 29126-2012 |
Fuel cell elecTric vehicles - Onboard hydrogen system - Test methods 燃料电池电动汽车 车载氢系统 试验方法+第1号修改单 |
China National Standards Tri |
English PDF |
| GB/T 26990-2011 |
Fuel cell elecTric vehicles - Onboard hydrogen system - Specifications 燃料电池电动汽车 车载氢系统 技术条件+第1号修改单 |
China National Standards Tri |
English PDF |
| GB/T 223.37-2020 |
Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotomeTric method after distillation separation 钢铁及合金 氮含量的测定 蒸馏分离靛酚蓝分光光度法 |
China National Standards Tri |
English PDF |
| GB/T 25127.1-2020 |
Low ambient temperature air source heat pump （water chilling）packages—Part 1：Heat pump （water chilling）packages for indusTrial & commercial and similar application 低环境温度空气源热泵（冷水）机组 第1部分：工业或商业用及类似用途的热泵（冷水）机组 |
China National Standards Tri |
English PDF |
| GB/T 20975.25-2020 |
Methods for chemical analysis of aluminium and aluminium alloys—Part 25：Determination of elements content—Inductively coupled plasma atomic emission spectromeTric method 铝及铝合金化学分析方法 第25部分：元素含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Tri |
English PDF |
| GB/T 20975.35-2020 |
Methods for chemical analysis of aluminium and aluminium alloys—Part 35:Determination of tungsten content—Thiocyanate spectrophotomeTric method 铝及铝合金化学分析方法 第35部分：钨含量的测定 硫氰酸盐分光光度法 |
China National Standards Tri |
English PDF |
| GB/T 38955-2020 |
Carbon contact sTrips for urban rail transit vehicles 城市轨道交通车辆用炭滑板 |
China National Standards Tri |
English PDF |
| GB/T 38946-2020 |
Specification of centralized operation and maintenance for disTributed photovoltaic power system 分布式光伏发电系统集中运维技术规范 |
China National Standards Tri |
English PDF |
| GB/T 38939-2020 |
Nickel-based alloy—Determination of multi-element contents—Spark discharge atomic emission spectromeTric method(routine method) 镍基合金 多元素含量的测定 火花放电原子发射光谱分析法（常规法） |
China National Standards Tri |
English PDF |
| GB/T 38903-2020 |
Technical guideline for material flow analysis of indusTrial parks 工业园区物质流分析技术导则 |
China National Standards Tri |
English PDF |
| GB/T 38893-2020 |
IndusTrial trucks—Safety monitoring system 工业车辆 安全监控管理系统 |
China National Standards Tri |
English PDF |
| GB/T 38877-2020 |
Insulating coatings for the elecTrical steel strip（sheet） 电工钢带（片）绝缘涂层 |
China National Standards Tri |
English PDF |
| GB/T 38839-2020 |
General technical requirements of flexible control for indusTrial robots 工业机器人柔性控制通用技术要求 |
China National Standards Tri |
English PDF |
| GB/T 38835-2020 |
IndusTrial robot—Life cycle impact on environment evaluation method 工业机器人 生命周期对环境影响评价方法 |
China National Standards Tri |
English PDF |
| GB/T 38831-2020 |
Technical requirements for IPTV media delivery system—Media disTribution and storage subsystem IPTV媒体交付系统技术要求 媒体分发存储子系统 |
China National Standards Tri |
English PDF |
| GB/T 38813-2020 |
General requirements for hot-rolled pickled steel sheet and sTrip 热轧酸洗钢板及钢带的一般要求 |
China National Standards Tri |
English PDF |
| GB/T 38812.3-2020 |
Direct reduced iron—Determination of silicon, manganese, phosphorus, vanadium, titanium, copper, aluminum, arsenic, magnesium, calcium, potassium and sodium content—Inductively coupled plasma atomic emission spectromeTric method 直接还原铁 硅、锰、磷、钒、钛、铜、铝、砷、镁、钙、钾、钠含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Tri |
English PDF |
| GB/T 38812.2-2020 |
Direct reduced iron—Determination of metallic iron content—The potassium dichromate tiTrimetric method after decomposition of sample by ferric chloride 直接还原铁 金属铁含量的测定 三氯化铁分解重铬酸钾滴定法 |
China National Standards Tri |
English PDF |
| GB/T 38812.1-2020 |
Direct reduced iron—Determination of iron(Ⅱ) content—The potassium dichromate tiTrimetric method after decomposition of sample by ferric chloride 直接还原铁 亚铁含量的测定 三氯化铁分解重铬酸钾滴定法 |
China National Standards Tri |
English PDF |
| GB/T 38806-2020 |
Metallic materials—Sheet and sTrip—Test method for bending and folding properties 金属材料 薄板和薄带 弯折性能试验方法 |
China National Standards Tri |
English PDF |
| GB/T 38801-2020 |
Technical requirements for content disTribution network—Interconnection use cases 内容分发网络技术要求 互联应用场景 |
China National Standards Tri |
English PDF |
| GB/T 36014.2-2020 |
IndusTrial process control devices—Radiation thermometers—Part 2：Determination of the technical data for radiation thermometers 工业过程控制装置 辐射温度计 第2部分：辐射温度计技术参数的确定 |
China National Standards Tri |
English PDF |
| GB/T 32288-2020 |
ElecTrical steel core for power transformers 电力变压器用电工钢铁心 |
China National Standards Tri |
English PDF |
| GB/T 29311-2020 |
ElecTrical insulating materials and systems—AC voltage endurance evaluation 电气绝缘材料和系统 交流电压耐久性评定 |
China National Standards Tri |
English PDF |
| GB/T 24180-2020 |
Cold-reduced electrolytic chromium/chromium oxide coated steel sheet and sTrip 冷轧电镀铬钢板及钢带 |
China National Standards Tri |
English PDF |
| GB/T 22578.3-2020 |
ElecTrical insulation system (EIS)—Thermal evaluation of combined liquid and solid components—Part 3:Hermetic motor-compressors 电气绝缘系统(EIS) 液体和固体组件的热评定 第3部分：密封式电动机-压缩机 |
China National Standards Tri |
English PDF |
| GB/T 20111.5-2020 |
ElecTrical insulation systems—Procedures for thermal evaluation—Part 5: Applications with a designed life of 5000h or less 电气绝缘系统 热评定规程 第5部分:设计寿命5000h及以下的应用 |
China National Standards Tri |
English PDF |
| GB/T 8454-2020 |
Reduced ilmenite powder for welding rob—Determination of ferrous iron content—Potassium dichromate tiTrimetric method 焊条用还原钛铁矿粉 亚铁含量的测定 重铬酸钾滴定法 |
China National Standards Tri |
English PDF |
| GB/T 8423.6-2020 |
Petroleum and natural gas indusTries terminology—Part 6:Safety and environmental protection and energy conservation 石油天然气工业术语 第6部分：安全环保节能 |
China National Standards Tri |
English PDF |
| GB/T 6730.82-2020 |
Iron ores—Determination of barium content—EDTA tiTrimetric method 铁矿石 钡含量的测定 EDTA滴定法 |
China National Standards Tri |
English PDF |
| GB/T 6730.81-2020 |
Iron ores—Determination of multiple trace elements—Inductively coupled plasma mass spectromeTric method 铁矿石 多种微量元素含量的测定 电感耦合等离子体质谱法 |
China National Standards Tri |
English PDF |
| GB/T 5226.7-2020 |
ElecTrical safety of machinery—Electrical equipment of machines—Part 7: Requirements of industrial robot 机械电气安全 机械电气设备 第7部分：工业机器人技术条件 |
China National Standards Tri |
English PDF |
| GB/T 4461-2020 |
Thermostat metal sTrip 热双金属带材 |
China National Standards Tri |
English PDF |
| GB/T 2900.103-2020 |
Electrotechnical terminology—Generation,transmission and disTribution of electrical energy—Dependability and quality of service of electric power systems 电工术语 发电、输电及配电 电力系统可信性及服务质量 |
China National Standards Tri |
English PDF |
| GB/T 8704.6-2020 |
Ferrovanadium—Determination of silicon content—The sulfuric acid dehydration gralimeTric method and the silicomolybdic blue photometric method 钒铁 硅含量的测定 硫酸脱水重量法和硅钼蓝分光光度法 |
China National Standards Tri |
English PDF |
| GB/T 8704.5-2020 |
Ferrovanadium—Determination of vanadium content—The ammonium ferrous sulfate tiTrimetric method and the potentiometric titrimetric method 钒铁 钒含量的测定 硫酸亚铁铵滴定法和电位滴定法 |
China National Standards Tri |
English PDF |
| GB/T 8704.10-2020 |
Ferrovanadium—Determination of silicon, manganese, phosphorus, aluminum, copper, chromium, nickel and titanium contents— Inductively coupled plasma atomic emission spectromeTric method 钒铁 硅、锰、磷、铝、铜、铬、镍、钛含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Tri |
English PDF |
| GB/T 5687.12-2020 |
Ferrochromium—Determination of phosphorus, aluminum, titanium, copper, manganese, calcium content—Inductively coupled plasma atomic emission spectromeTric method 铬铁 磷、铝、钛、铜、锰、钙含量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Tri |
English PDF |
| GB 9706.203-2020 |
Medical elecTrical equipment—Part 2-3: Particular requirements for the basic safety and essential performance of short-wave therapy equipment 医用电气设备 第2-3部分：短波治疗设备的基本安全和基本性能专用要求 |
China National Standards Tri |
English PDF |
| GB 24500-2020 |
Minimum allowable values of energy efficiency and energy efficiency grades of indusTrial boilers 工业锅炉能效限定值及能效等级 |
China National Standards Tri |
English PDF |
| GB 24155-2020 |
Safety specifications for elecTric motorcycles and electric mopeds 电动摩托车和电动轻便摩托车安全要求 |
China National Standards Tri |
English PDF |
| GB 38032-2020 |
ElecTric buses safety requirements 电动客车安全要求 |
China National Standards Tri |
English PDF |
| GB 38031-2020 |
ElecTric vehicles traction battery safety requirements 电动汽车用动力蓄电池安全要求 |
China National Standards Tri |
English PDF |
| GB 18384-2020 |
ElecTric vehicles safety requirements 电动汽车安全要求 |
China National Standards Tri |
English PDF |
| GB/T 38761-2020 |
GeomeTrical product specifications (GPS)—Characteristics and conditions—Definitions 产品几何技术规范（GPS） 特征和条件 定义 |
China National Standards Tri |
English PDF |
| GB/T 38762.3-2020 |
GeomeTrical product specifications (GPS)—Dimensional tolerancing—Part 3: Angular sizes 产品几何技术规范（GPS） 尺寸公差 第3部分：角度尺寸 |
China National Standards Tri |
English PDF |
| GB/T 38762.1-2020 |
GeomeTrical product specifications (GPS)—Dimensional tolerancing—Part 1: Linear sizes 产品几何技术规范（GPS） 尺寸公差 第1部分：线性尺寸 |
China National Standards Tri |
English PDF |
| GB/T 38762.2-2020 |
GeomeTrical product specifications (GPS)—Dimensional tolerancing—Part 2: Dimensions other than linear or angular sizes 产品几何技术规范（GPS） 尺寸公差 第2部分：除线性、角度尺寸外的尺寸 |
China National Standards Tri |
English PDF |
| GB/T 38760-2020 |
GeomeTrical product specifications (GPS)—Features utilized in specification and verification 产品几何技术规范（GPS） 规范和检验中使用的要素 |
China National Standards Tri |
English PDF |
| GB/T 38666-2020 |
Information technology—Big data—IndusTrial application reference architecture 信息技术 大数据 工业应用参考架构 |
China National Standards Tri |
English PDF |
| GB/T 38642-2020 |
IndusTrial robot life cycle risk assessment methods 工业机器人生命周期风险评价方法 |
China National Standards Tri |
English PDF |
| GB/T 37414.2-2020 |
ElecTrical equipment and system of industrial robot—Part 2: Requirements for AC servo driver device 工业机器人电气设备及系统 第2部分：交流伺服驱动装置技术条件 |
China National Standards Tri |
English PDF |
| GB/T 37414.3-2020 |
ElecTrical equipment and system of industrial robot—Part 3 : Requirements for AC servo motor 工业机器人电气设备及系统 第3部分：交流伺服电动机技术条件 |
China National Standards Tri |
English PDF |
| GB/T 34874.6-2020 |
GeomeTrical product specifications (GPS)—X-ray three dimensional size measuring machines—Part 6: Testing method of workpieces 产品几何技术规范（GPS） X射线三维尺寸测量机 第6部分：工件的检测方法 |
China National Standards Tri |
English PDF |
| GB/T 31396.3-2020 |
Machine tools—Dimensions and geomeTric tests for self-centring chucks with two-piece jaws—Part 3:Power-operated chucks with serrated jaws 机床 分离爪自定心卡盘尺寸和几何精度检验 第3部分：梳齿配合型动力卡盘 |
China National Standards Tri |
English PDF |
| GB/T 38777-2020 |
Technical requirements and methods of measurement for digital terresTrial television external receiving module 地面数字电视外接模块式接收终端技术要求和测量方法 |
China National Standards Tri |
English PDF |
| GB/T 28826.2-2020 |
Information technology—Common biomeTric exchange formats framework—Part 2:Procedures for the operation of the biometric registration authority 信息技术 公用生物特征识别交换格式框架 第2部分：生物特征识别注册机构操作规程 |
China National Standards Tri |
English PDF |
| GB/T 24637.4-2020 |
GeomeTrical product specifications(GPS)—General concepts—Part 4: Geometrical characteristics for quantifying GPS deviations 产品几何技术规范（GPS） 通用概念 第4部分:几何特征的GPS偏差量化 |
China National Standards Tri |
English PDF |
| GB/T 24637.3-2020 |
GeomeTrical product specifications (GPS)—General concepts—Part 3: Toleranced features
产品几何技术规范（GPS） 通用概念 第3部分：被测要素 |
China National Standards Tri |
English PDF |
| GB/T 24637.2-2020 |
GeomeTrical product specifications (GPS)—General concepts—Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities 产品几何技术规范（GPS） 通用概念 第2部分：基本原则、规范、操作集和不确定度 |
China National Standards Tri |
English PDF |
| GB/T 24637.1-2020 |
GeomeTrical product specifications (GPS)—General concepts—Part 1: Model for geometrical specification and verification 产品几何技术规范（GPS） 通用概念 第1部分：几何规范和检验的模型 |
China National Standards Tri |
English PDF |
| GB/T 20308-2020 |
GeomeTrical product specifications(GPS)—Matrix model 产品几何技术规范（GPS） 矩阵模型 |
China National Standards Tri |
English PDF |
| GB/T 13319-2020 |
GeomeTrical product specifications (GPS)—Geometrical tolerancing—Pattern and combined geometrical specification 产品几何技术规范（GPS） 几何公差 成组（要素）与组合几何规范 |
China National Standards Tri |
English PDF |
| GB/T 5226.34-2020 |
ElecTrical safety of machinery—Electrical equipment of machines—Part 34: Requirements for machine tools 机械电气安全 机械电气设备 第34部分：机床技术条件 |
China National Standards Tri |
English PDF |
| GB/T 3286.10-2020 |
Methods for chemical analysis of limestone and dolornite一Part 10:Determination of titanium dioxide content一Diantipyrylmethane spectrophotomeTric method 石灰石及白云石化学分析方法 第10部分：二氧化钛含量的测定 二安替吡啉甲烷分光光度法 |
China National Standards Tri |
English PDF |
| GB/T 2481.2-2020 |
Bonded abrasives—Determination and designation of grain size disTribution—Part 2:Microgrits 固结磨具用磨料 粒度组成的检测和标记 第2部分：微粉 |
China National Standards Tri |
English PDF |
| GB/T 1800.2-2020 |
GeomeTrical product specifications (GPS)—ISO code system for tolerances on linear sizes—Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts 产品几何技术规范（GPS） 线性尺寸公差ISO代号体系 第2部分：标准公差带代号和孔、轴的极限偏差表 |
China National Standards Tri |
English PDF |
| GB/T 1800.1-2020 |
GeomeTrical product specifications (GPS)—ISO code system for tolerances on linear sizes—Part 1: Basis of tolerances, deviations and fits 产品几何技术规范（GPS） 线性尺寸公差ISO代号体系 第1部分：公差、偏差和配合的基础 |
China National Standards Tri |
English PDF |
| GB/T 38775.3-2020 |
ElecTric vehicle wireless power transfer—Part 3: Specific requirements 电动汽车无线充电系统 第3部分：特殊要求 |
China National Standards Tri |
English PDF |
| GB/T 38775.1-2020 |
ElecTric vehicle wireless power transfer—Part 1:General requirements 电动汽车无线充电系统 第1部分：通用要求 |
China National Standards Tri |
English PDF |
| GB/T 38775.4-2020 |
ElecTric vehicle wireless power transfer—Part 4：Limits and test methods of electromagnetic environment 电动汽车无线充电系统 第4部分：电磁环境限值与测试方法 |
China National Standards Tri |
English PDF |
| GB/T 38775.2-2020 |
ElecTric vehicle wireless power transfer—Part 2: Communication protocols between on-board charger and wireless power transfer device 电动汽车无线充电系统 第2部分：车载充电机和无线充电设备之间的通信协议 |
China National Standards Tri |
English PDF |
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