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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 18386.1-2021 |
Energy Consumption and Driving Range Test Methods for Electric Vehicles - Part 1: Light-Duty Vehicles (Amendment No. 1) 电动汽车能量消耗量和续驶里程试验方法-第1部分：轻型汽车《第1号修改单》 |
China National Standards Part |
 English PDF |
| GB/T 46044.2-2025 |
Acoustics - Determination of sound power levels of noise sources using the sound pressure method Engineering Methods for Small Portable Sound Sources in Reverberant Fields - Part 2: Specialized Reverberation Chamber Method 声学-声压法测定噪声源声功率级-混响场中的小型可移动声源工程法-第2部分：专用混响测试室法 |
China National Standards Part |
English PDF |
| GB/T 46023.3-2025 |
Automotive smart photochromic glass - Part 3: Suspended particle dimming glass 汽车用智能变色玻璃-第3部分：悬浮粒子调光玻璃 |
China National Standards Part |
English PDF |
| GB/T 46023.2-2025 |
Automotive smart photochromic glass - Part 2: Polymer dispersed liquid crystal dimming glass 汽车用智能变色玻璃-第2部分：聚合物分散液晶调光玻璃 |
China National Standards Part |
English PDF |
| GB/T 46023.1-2025 |
Automotive Smart Photochromic Glass - Part 1: Part: Organic electrochromic glass 汽车用智能变色玻璃-第1部分：有机电致变色玻璃 |
China National Standards Part |
English PDF |
| GB/T 46020.2-2025 |
Plastics - Guidelines for Recyclable Design - Part 2: High-Density Polyethylene (PE-HD) Materials 塑料-可回收再生设计指南-第2部分：高密度聚乙烯（PE-HD）材料 |
China National Standards Part |
English PDF |
| GB/T 46020.1-2025 |
Plastics - Guidelines for Recyclable Design - Part 1: Polyethylene Terephthalate (PET) Materials 塑料-可回收再生设计指南-第1部分：聚对苯二甲酸乙二醇酯（PET）材料 |
China National Standards Part |
English PDF |
| GB/T 46019.2-2025 |
Plastics - Identification of Recycled Plastic Components - Part 2: Polypropylene (PP) Materials 塑料-再生塑料成分鉴别-第2部分：聚丙烯（PP）材料 |
China National Standards Part |
English PDF |
| GB/T 46019.1-2025 |
Plastics - Identification of Recycled Plastic Components - Part 1: Polyethylene Terephthalate (PET) Materials 塑料-再生塑料成分鉴别-第1部分：聚对苯二甲酸乙二醇酯（PET）材料 |
China National Standards Part |
English PDF |
| GB/T 46018.2-2025 |
Plastics - Technical Specifications for Evaluation of Recycled Plastic Products - Part 2: Polystyrene (PS) Materials 塑料-再生塑料产品评价技术规范-第2部分：聚苯乙烯（PS）材料 |
China National Standards Part |
English PDF |
| GB/T 46018.1-2025 |
Plastics - Technical Specifications for Evaluation of Recycled Plastic Products - Part 1: Polyethylene Terephthalate (PET) Materials 塑料-再生塑料产品评价技术规范-第1部分：聚对苯二甲酸乙二醇酯（PET）材料 |
China National Standards Part |
English PDF |
| GB/T 46011.2-2025 |
Road Vehicles - General Requirements for Greenhouse Gas Management - Part 2: Product Carbon Footprint Labeling 道路车辆-温室气体管理通用要求-第2部分：产品碳足迹标识 |
China National Standards Part |
English PDF |
| GB/T 46011.1-2025 |
Road Vehicles - General Requirements for Greenhouse Gas Management - Part 2 Part 1: Terms and Definitions 道路车辆-温室气体管理通用要求-第1部分：术语和定义 |
China National Standards Part |
English PDF |
| GB/T 45999.2-2025 |
Dentistry - Dental Sintering Furnaces - Part 2: Test Methods for Sintering Furnace Program Design for Glazing Sintering Evaluation 牙科学-牙科烧结炉-第2部分：上釉烧结评价烧结炉程序设计的测试方法 |
China National Standards Part |
English PDF |
| GB/T 45990.1-2025 |
Digital Simulation Testing for Household and Similar Electrical Appliances - Part 1: General Requirements 家用和类似用途电器数字化仿真试验-第1部分：通用要求 |
China National Standards Part |
English PDF |
| GB/T 45983.1-2025 |
Chemical Heat Treatment of Rare Earth Elements - Part 1: Carburizing and Carbonitriding 稀土化学热处理-第1部分：渗碳及碳氮共渗 |
China National Standards Part |
English PDF |
| GB/T 45982.3-2025 |
Microjoining of Second-Generation High-Temperature Superconductors - Part 3: Joint Test Methods 第二代高温超导体微连接-第3部分：接头试验方法 |
China National Standards Part |
English PDF |
| GB/T 45982.2-2025 |
Microjoining of Second-Generation High-Temperature Superconductors - Part 2: Welding and Test Personnel Qualifications 第二代高温超导体微连接-第2部分：焊接与试验人员资格 |
China National Standards Part |
English PDF |
| GB/T 45982.1-2025 |
Microjoining of Second-Generation High-Temperature Superconductors - Part 1: Process Requirements 第二代高温超导体微连接-第1部分：工艺要求 |
China National Standards Part |
English PDF |
| GB/T 45981.3-2025 |
Large Castings and Forgings for Heavy-Duty Gas Turbines - Part 3: Steel Castings 重型燃气轮机用大型铸锻件-第3部分：铸钢件 |
China National Standards Part |
English PDF |
| GB/T 45981.2-2025 |
Large Castings and Forgings for Heavy-Duty Gas Turbines - Part 2: High-Temperature Alloy Die Forgings 重型燃气轮机用大型铸锻件-第2部分：高温合金模锻件 |
China National Standards Part |
English PDF |
| GB/T 45969-2025 |
Particle characterization - Terminology 颗粒表征-术语 |
China National Standards Part |
English PDF |
| GB/T 45966.1-2025 |
Petroleum and natural gas industry - Well integrity - Part 1: Life cycle management 石油天然气工业-井完整性-第-1-部分：生命周期管理 |
China National Standards Part |
English PDF |
| GB/T 45963.5-2025 |
Digital government architecture framework - Part 5: Information exchange model 数字政府架构框架-第5部分：信息交换模型 |
China National Standards Part |
English PDF |
| GB/T 45963.4-2025 |
Digital government architecture framework - Part 4: Capacity assessment 数字政府架构框架-第4部分：能力评估 |
China National Standards Part |
English PDF |
| GB/T 45963.3-2025 |
Digital government architecture framework - Part 3: Governance 数字政府架构框架-第3部分：治理 |
China National Standards Part |
English PDF |
| GB/T 45963.2-2025 |
Digital government architecture framework - Part 2: Architecture design 数字政府架构框架-第2部分：架构设计 |
China National Standards Part |
English PDF |
| GB/T 45963.1-2025 |
Digital government architecture framework - Part 1: Reference model 数字政府架构框架-第1部分：参考模型 |
China National Standards Part |
English PDF |
| GB/T 45906.10-2025 |
Substation Secondary Systems - Part 10: Testing and Inspection 变电站二次系统-第10部分：试验与检测 |
China National Standards Part |
English PDF |
| GB/T 45906.9-2025 |
Substation Secondary Systems - Part 9: Construction Specifications 变电站二次系统-第9部分：建设规范 |
China National Standards Part |
English PDF |
| GB/T 45906.8-2025 |
Substation Secondary Systems - Part 8: Electrical Operation Error Prevention 变电站二次系统-第8部分：电气操作防误 |
China National Standards Part |
English PDF |
| GB/T 45906.7-2025 |
Substation Secondary Systems - Part 7: Centralized Monitoring Systems 变电站二次系统-第7部分：集中监控系统 |
China National Standards Part |
English PDF |
| GB/T 45906.6-2025 |
Substation Secondary Systems - Part 6: On-site Monitoring Systems 变电站二次系统-第6部分：站内监控系统 |
China National Standards Part |
English PDF |
| GB/T 45906.5-2025 |
Substation Secondary Systems - Part 5: Protection, Control, and Related Equipment 变电站二次系统-第5部分：保护控制及相关设备 |
China National Standards Part |
English PDF |
| GB/T 45906.4-2025 |
Substation Secondary Systems - Part 4: Network Security Protection 变电站二次系统-第4部分：网络安全防护 |
China National Standards Part |
English PDF |
| GB/T 45906.3-2025 |
Substation Secondary Systems - Part 3: Communication Message Specifications 变电站二次系统-第3部分：通信报文规范 |
China National Standards Part |
English PDF |
| GB/T 45906.2-2025 |
Substation Secondary Systems - Part 2: Data and Models 变电站二次系统-第2部分：数据与模型 |
China National Standards Part |
English PDF |
| GB/T 45906.1-2025 |
Substation Secondary Systems - Part 1: General Requirements 变电站二次系统-第1部分：通用要求 |
China National Standards Part |
English PDF |
| GB/T 45905.10-2025 |
Electricity Spot Market Operations - Part 10: Operational Evaluation 电力现货市场运营-第10部分：运营评估 |
China National Standards Part |
English PDF |
| GB/T 45905.9-2025 |
Electricity Spot Market Operations - Part 9: Market Power Monitoring and Mitigation 电力现货市场运营-第9部分：市场力监测与缓解 |
China National Standards Part |
English PDF |
| GB/T 45905.8-2025 |
Electricity Spot Market Operations - Part 8: Multi-Period Power Balance Calculation Method 电力现货市场运营-第8部分：多周期电力电量平衡计算方法 |
China National Standards Part |
English PDF |
| GB/T 45905.7-2025 |
Electricity Spot Market Operations - Part 7: Reserve Capacity Management 电力现货市场运营-第7部分：备用容量管理 |
China National Standards Part |
English PDF |
| GB/T 45905.6-2025 |
Electricity spot market Operations - Part 6: Frequency Regulation Capacity Management 电力现货市场运营-第6部分：调频容量管理 |
China National Standards Part |
English PDF |
| GB/T 45905.5-2025 |
Electricity spot market operations - Part 5: Calculation method for the participation of renewable energy in the electricity balance 电力现货市场运营-第5部分：新能源参与电力平衡计算方法 |
China National Standards Part |
English PDF |
| GB/T 45905.4-2025 |
Electricity spot market operations - Part 4: Load forecasting 电力现货市场运营-第4部分：负荷预测 |
China National Standards Part |
English PDF |
| GB/T 45905.3-2025 |
Electricity spot market operations - Part 3: Interprovincial technical support system 电力现货市场运营-第3部分：省间技术支持系统 |
China National Standards Part |
English PDF |
| GB/T 45905.2-2025 |
Electricity spot market operations - Part 2: Provincial technical support system 电力现货市场运营-第2部分：省级技术支持系统 |
China National Standards Part |
English PDF |
| GB/T 45905.1-2025 |
Electricity spot market operations - Part 1: Terminology 电力现货市场运营-第1部分：术语 |
China National Standards Part |
English PDF |
| GB/T 45903.3-2025 |
Ships and marine technology - Pilot ladders - Part 3: Accessories and related equipment 船舶与海上技术-引航员软梯-第3部分：附件及相关设备 |
China National Standards Part |
English PDF |
| GB/T 45903.2-2025 |
Ships and marine technology - Pilot ladders - Part 2: Maintenance, use, survey, and inspection 船舶与海上技术-引航员软梯-第2部分：维护、使用、勘测和检查 |
China National Standards Part |
English PDF |
| GB/T 45898.1-2025 |
Medical gas pipeline system terminals - Part 1: Terminals for compressed medical gases and vacuum 医用气体管道系统终端-第1部分：用于压缩医用气体和真空的终端 |
China National Standards Part |
English PDF |
| GB/T 45897.4-2025 |
Medical gas pressure regulators - Part 4: Low-pressure pressure regulators 医用气体压力调节器-第4部分：低压压力调节器 |
China National Standards Part |
English PDF |
| GB/T 45897.3-2025 |
Medical gas pressure regulators - Part 3: Pressure regulators with integrated cylinder valves (VIPRs) 医用气体压力调节器-第3部分：集成气瓶阀的压力调节器（VIPRs） |
China National Standards Part |
English PDF |
| GB/T 45897.2-2025 |
Medical gas pressure regulators - Part 2: Busbar pressure regulators and pipeline pressure regulators 医用气体压力调节器-第2部分：汇流排压力调节器和管道压力调节器 |
China National Standards Part |
English PDF |
| GB/T 45897.1-2025 |
Medical Gas Pressure Regulators - Part 1: Pressure regulators and pressure regulators with flow meters 医用气体压力调节器-第1部分：压力调节器和带有流量计的压力调节器 |
China National Standards Part |
English PDF |
| GB/T 45870.1-2025 |
Springs - Measurement and Test Parameters - Part 1: Cold-Formed Cylindrical Helical Compression Springs 弹簧-测量和试验参数-第1部分：冷成形圆柱螺旋压缩弹簧 |
China National Standards Part |
English PDF |
| GB/T 45868-2025 |
Additive Manufacturing - Technical Specifications for Titanium Alloy Parts by Laser Powder Bed Fusion 增材制造-激光粉末床熔融钛合金制件技术规范 |
China National Standards Part |
English PDF |
| GB/T 45864.1-2025 |
Earth-Moving Machinery - Collision Warning and Avoidance - Part 1: General Requirements 土方机械-碰撞警告和避免-第1部分：通用要求 |
China National Standards Part |
English PDF |
| GB/T 45860.2-2025 |
Acceptance Testing of Fiber Laser Beam Welders - Part 2: Moving Mechanisms for Fiber Optic Conveyors 光纤激光束焊机的验收试验-第2部分:光纤输送机的移动机构 |
China National Standards Part |
English PDF |
| GB/T 45860.1-2025 |
Fiber Laser Beam Welder Acceptance Tests - Part 1: Laser Components for Fiber Optic Conveyors 光纤激光束焊机的验收试验-第1部分:光纤输送机的激光组件 |
China National Standards Part |
English PDF |
| GB/T 45850.1-2025 |
Packaging Bags - Test Conditions - Part 1: Paper Bags 包装袋-试验条件-第1部分：纸袋 |
China National Standards Part |
English PDF |
| GB/T 45800.1-2025 |
National Integrated Government Big Data System - Part 1: Overall Framework 全国一体化政务大数据体系-第1部分：总体框架 |
China National Standards Part |
English PDF |
| GB/T 45505.5-2025 |
Test Methods for Glass Substrates for Flat Panel Displays - Part 5: Optoelectronic Properties 平板显示器基板玻璃测试方法-第5部分：光电性能 |
China National Standards Part |
English PDF |
| GB/T 45505.3-2025 |
Test Methods for Glass Substrates for Flat Panel Displays - Part 3: Thermal Properties 平板显示器基板玻璃测试方法-第3部分：热学性能 |
China National Standards Part |
English PDF |
| GB/T 45505.2-2025 |
Test Methods for Glass Substrates for Flat Panel Displays - Part 2: Surface Properties 平板显示器基板玻璃测试方法-第2部分：表面性能 |
China National Standards Part |
English PDF |
| GB/T 45505.1-2025 |
Test Methods for Glass Substrates for Flat Panel Displays - Part 1: Appearance and Dimensions 平板显示器基板玻璃测试方法-第1部分：外观与几何尺寸 |
China National Standards Part |
English PDF |
| GB/T 45305.2-2025 |
Acoustics - Laboratory Measurement of Sound Insulation of Building Components - Part 2: Measurement of Airborne Sound Insulation 声学-建筑构件隔声的实验室测量-第2部分：空气声隔声测量 |
China National Standards Part |
English PDF |
| GB/T 45159.6-2025 |
Mechanical Vibration and Shock - Characterization of Dynamic Mechanical Properties of Viscoelastic Materials - Part 6: Time-Temperature Superposition 机械振动与冲击-黏弹性材料动态力学性能的表征-第6部分：时温叠加 |
China National Standards Part |
English PDF |
| GB/T 45159.5-2025 |
Mechanical Vibration and Shock - Characterization of Dynamic Mechanical Properties of Viscoelastic Materials - Part 5: Poisson's Ratio Based on Comparison of Measurement and Finite Element Analysis 机械振动与冲击-黏弹性材料动态力学性能的表征-第5部分：基于测量和有限元分析比较的泊松比 |
China National Standards Part |
English PDF |
| GB/T 45159.4-2025 |
Mechanical Vibration and Shock - Characterization of Dynamic Mechanical Properties of Viscoelastic Materials - Part 4: Dynamic Stiffness Method 机械振动与冲击-黏弹性材料动态力学性能的表征-第4部分：动刚度法 |
China National Standards Part |
English PDF |
| GB/T 43683.3-2025 |
Hydrogenerator unit installation procedures and public Differential Guidelines - Part 3: Vertical Francis Turbine or Pump-Turbine 水轮发电机组安装程序与公差导则-第3部分：立式混流式水轮机或水泵水轮机 |
China National Standards Part |
English PDF |
| GB/T 42495.2-2025 |
Financial services - Global legal entity identifier - Part 2: Application in digital certificates 金融服务-全球法人识别编码-第2部分：在数字证书中的应用 |
China National Standards Part |
English PDF |
| GB/T 41762.1-2025 |
Fiber-reinforced plastic composites - Determination of through-thickness properties of laminates - Part 1: Direct tension and compression tests 纤维增强塑料复合材料-层合板厚度方向性能的测定-第1部分：直接拉伸和压缩试验 |
China National Standards Part |
English PDF |
| GB/T 41304.5-2025 |
Knowledge management methods and tools - Part 5: Organizational knowledge management maturity assessment 知识管理方法和工具-第5部分：组织知识管理成熟度评估 |
China National Standards Part |
English PDF |
| GB/T 41304.3-2025 |
Knowledge management methods and tools - Part 3: Meeting knowledge management 知识管理方法和工具-第3部分：会议知识管理 |
China National Standards Part |
English PDF |
| GB/T 41270.3-2025 |
Avionics process management - Atmospheric radiation effects - Part 3: System design optimization considering single-event effects (SEE) of atmospheric radiation 航空电子过程管理-大气辐射影响-第3部分：考虑大气辐射单粒子效应（SEE）的系统设计优化 |
China National Standards Part |
English PDF |
| GB/T 40344.4-2025 |
Vacuum technology - Standard method for measuring vacuum pump performance - Part 4: Turbomolecular pumps 真空技术-真空泵性能测量标准方法-第4部分：涡轮分子泵 |
China National Standards Part |
English PDF |
| GB/T 40006.13-2025 |
Plastics - Recycled plastics - Part 13: Polyphenylene ether (PPE) 塑料-再生塑料-第13部分：聚苯醚（PPE）材料 |
China National Standards Part |
English PDF |
| GB/T 40006.4-2025 |
Plastics - Recycled plastics - Part 4: Polyolefin blends (MPO) 塑料-再生塑料-第4部分：聚烯烃混合物(MPO)材料 |
China National Standards Part |
English PDF |
| GB/T 38278.3-2025 |
Technical requirements for holographic anti-counterfeiting products - Part 3: Anti-counterfeiting holographic hot stamping foil 全息防伪产品技术条件-第3部分：防伪全息烫印箔 |
China National Standards Part |
English PDF |
| GB/T 38278.2-2025 |
Technical requirements for holographic anti-counterfeiting products - Part 2: Anti-counterfeiting holographic paper 全息防伪产品技术条件-第2部分：防伪全息纸 |
China National Standards Part |
English PDF |
| GB/T 37946.2-2025 |
Test methods for organic luminescent materials - Part 2: Thermal properties 有机发光材料测试方法-第2部分：热学性能 |
China National Standards Part |
English PDF |
| GB/T 35205.4-2025 |
Rough terrain forklifts - Safety requirements and verification - Part 4: Additional requirements for telescopic forklifts carrying freely swinging loads 越野叉车-安全要求及验证-第4部分：吊运可自由摆动载荷的伸缩臂式叉车的附加要求 |
China National Standards Part |
English PDF |
| GB/T 34880.3-2025 |
Test conditions for five-axis machining centers - Part 3: Technical specifications 五轴联动加工中心检验条件-第3部分：技术条件 |
China National Standards Part |
English PDF |
| GB/T 34880.2-2025 |
Test conditions for five-axis machining centers - Part 2: Accuracy inspection of vertical machine tools 五轴联动加工中心检验条件-第2部分：立式机床精度检验 |
China National Standards Part |
English PDF |
| GB/T 34880.1-2025 |
Test conditions for five-axis machining centers - Part 1: Accuracy inspection of horizontal machine tools 五轴联动加工中心检验条件-第1部分：卧式机床精度检验 |
China National Standards Part |
English PDF |
| GB/T 33767.1-2025 |
Information Technology - Biometric Sample Quality - Part 1: Framework 信息技术-生物特征样本质量-第1部分：框架 |
China National Standards Part |
English PDF |
| GB/T 33014.4-2025 |
Road Vehicles - Test Methods for Immunity of Electrical/Electronic Components to Narrowband Radiated Electromagnetic Energy - Part 4: Wire Beam Excitation Method 道路车辆-电气/电子部件对窄带辐射电磁能的抗扰性试验方法-第4部分：线束激励法 |
China National Standards Part |
English PDF |
| GB/T 33014.2-2025 |
Road Vehicles - Test Methods for Immunity of Electrical/Electronic Components to Narrowband Radiated Electromagnetic Energy - Part 2: Anechoic Chamber Method 道路车辆-电气/电子部件对窄带辐射电磁能的抗扰性试验方法-第2部分：电波暗室法 |
China National Standards Part |
English PDF |
| GB/T 33012.4-2025 |
Road Vehicles - Test Methods for Immunity of Vehicles to Narrowband Radiated Electromagnetic Energy - Part 4: Wire Beam Excitation Method 道路车辆-车辆对窄带辐射电磁能的抗扰性试验方法-第4部分：线束激励法 |
China National Standards Part |
English PDF |
| GB/T 32960.2-2025 |
Technical Specifications for Electric Vehicle Remote Service and Management Systems - Part 2: On-Board Terminals 电动汽车远程服务与管理系统技术规范-第2部分：车载终端 |
China National Standards Part |
English PDF |
| GB/T 32151.51-2025 |
Greenhouse Gas Emissions Accounting and Reporting Requirements - Part 51: Stamping Enterprises 温室气体排放核算与报告要求-第51部分：冲压企业 |
China National Standards Part |
English PDF |
| GB/T 31334.7-2025 |
Test Methods for Dipped Canvas - Part 7: Dynamic Fatigue Adhesion Performance 浸胶帆布试验方法-第7部分：动态疲劳粘合性能 |
China National Standards Part |
English PDF |
| GB/T 30310.1-2025 |
Determination of Adhesive Content of Dipped Cord, Cord, and Yarn - Part 1: Nuclear Magnetic Resonance Method 浸胶帘线、线绳、纱线附胶量的测定-第1部分：核磁共振仪法 |
China National Standards Part |
English PDF |
| GB/T 30104.222-2025 |
Digital Addressable Lighting Interface - Part 222: Particular Requirements for Control Gear - Heat Lamp Protection (Equipment Type 21) 数字可寻址照明接口-第222部分：控制装置的特殊要求-热灯保护（设备类型21） |
China National Standards Part |
English PDF |
| GB/T 30104.220-2025 |
Digital Addressable Lighting Interface - Part 220: Particular Requirements for Control Gear - Central Power Supply Emergency Operation (Equipment Type 19) 数字可寻址照明接口-第220部分：控制装置的特殊要求-中央供电应急操作（设备类型19） |
China National Standards Part |
English PDF |
| GB/T 30104.207-2025 |
Digital addressable lighting interface - Part 207: Particular requirements for control devices LED Module (Equipment Type 6) 数字可寻址照明接口-第207部分：控制装置的特殊要求-LED模块（设备类型6） |
China National Standards Part |
English PDF |
| GB/T 30104.104-2025 |
Digital addressable lighting interface - Part 104: General requirements - Wireless and other wired system components 数字可寻址照明接口-第104部分：一般要求-无线和其他有线系统组件 |
China National Standards Part |
English PDF |
| GB/T 30104.102-2025 |
Digital addressable lighting interface - Part 102: General requirements - Control devices 数字可寻址照明接口-第102部分：一般要求-控制装置 |
China National Standards Part |
English PDF |
| GB/T 30104.101-2025 |
Digital addressable lighting interface - Part 101: General requirements - System components 数字可寻址照明接口-第101部分：一般要求-系统组件 |
China National Standards Part |
English PDF |
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