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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 18268.32-2022 |
Electrical equipment for measurement, control and laboratory use - Electromagnetic compatibility requirements - Part 32: Immunity requirements for safety-related systems and equipment intended to peRForm safety-related functions (functional safety) - Indu 测量、控制和实验室用的电设备 电磁兼容性要求 第32部分：安全相关系统和预期执行安全相关功能（功能安全）设备的抗扰度要求 特定电磁环境的工业应用 |
China National Standards RF |
 English PDF |
| GB/T 18268.31-2022 |
Electrical equipment for measurement, control and laboratory use - Electromagnetic compatibility requirements - Part 31: Immunity requirements for safety-related systems and equipment intended to peRForm safety-related functions (functional safety) Genera 测量、控制和实验室用的电设备 电磁兼容性要求 第31部分：安全相关系统和预期执行安全相关功能（功能安全）设备的抗扰度要求 一般工业应用 |
China National Standards RF |
English PDF |
| GB/T 41805-2022 |
Quantitative detection method for suRFace defects of optical components-microscattering dark-field imaging method 光学元件表面疵病定量检测方法 显微散射暗场成像法 |
China National Standards RF |
English PDF |
| GB/T 41767-2022 |
Test method for moisture absorption peRFormance and equilibrium state adjustment of polymer matrix composites 聚合物基复合材料吸湿性能及平衡状态调节试验方法 |
China National Standards RF |
English PDF |
| GB/T 41743-2022 |
Rapid detection and evaluation method of vacuum glass insulation peRFormance and its attenuation - unsteady state method 真空玻璃保温性能及其衰减快速检测评估方法 非稳态法 |
China National Standards RF |
English PDF |
| GB/T 41872-2022 |
Heat exchangers used in refrigeration systems and heat pumps—Temperature, pressure and velocity three-field synergy peRFormance test and evaluation method 制冷系统及热泵用换热器 温度、压力和速度三场协同的性能测试和评价方法 |
China National Standards RF |
English PDF |
| GB/T 41922-2022 |
Stage equipment fault data transmission inteRFace and communication protocol specification 舞台装备故障数据传输接口和通讯协议规范 |
China National Standards RF |
English PDF |
| GB/T 41751-2022 |
Test method for radius of curvature of crystal suRFace of gallium nitride single crystal substrate 氮化镓单晶衬底片晶面曲率半径测试方法 |
China National Standards RF |
English PDF |
| GB/T 41760-2022 |
Test method for spontaneous polarization peRFormance of tourmaline 电气石自发极化性能测试方法 |
China National Standards RF |
English PDF |
| GB/T 30661.6-2022 |
Seats for wheelchairs - Part 6: Simulated use and determination of seat cushion peRFormance changes 轮椅车座椅 第6部分：模拟使用和座垫性能变化的测定 |
China National Standards RF |
English PDF |
| GB/T 41716-2022 |
Determination of main active ingredients in lacquer tree by high peRFormance liquid chromatography 漆树中主要有效成分含量的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 19042.5-2022 |
Evaluation and routine tests in medical imaging sector - Part 3-5: X-ray computed tomography equipment imaging peRFormance acceptance test and stability test 医用成像部门的评价及例行试验 第3-5部分：X射线计算机体层摄影设备成像性能验收试验与稳定性试验 |
China National Standards RF |
English PDF |
| GB/T 36731-2018 |
Temporary construction of the stage and stands of the peRFormance venue safety "No. 1 Amendment" 临时搭建演出场所舞台、看台安全《第1号修改单》 |
China National Standards RF |
English PDF |
| GB/T 41735-2022 |
Green Manufacturing Laser SuRFace Cleaning Technical Specifications 绿色制造 激光表面清洗技术规范 |
China National Standards RF |
English PDF |
| GB/T 14043.1-2022 |
Hydraulic transmission - Identification codes for valves - Part 1: Mounting suRFaces and valve holes 液压传动 阀的标识代号 第1部分：安装面和阀孔 |
China National Standards RF |
English PDF |
| GB/T 38265.17-2022 |
Soldering flux test methods - Part 17: SuRFace insulation resistance comb test and electrochemical migration test for flux residues 软钎剂试验方法 第17部分：钎剂残留物的表面绝缘电阻梳刷试验和电化学迁移试验 |
China National Standards RF |
English PDF |
| GB/T 23023-2022 |
Informatization and industrialization integration management system Production equipment operation peRFormance evaluation index set 信息化和工业化融合管理体系 生产设备运行绩效评价指标集 |
China National Standards RF |
English PDF |
| GB/T 32070-2022 |
Earth-moving machinery - Object monitoring systems and their visual aids - PeRFormance requirements and tests 土方机械 物体监测系统及其可视辅助装置 性能要求和试验 |
China National Standards RF |
English PDF |
| GB/T 22131-2022 |
Ultrasonic Testing Method for the Inner SuRFace of Cylindrical Forgings 筒形锻件内表面超声波检测方法 |
China National Standards RF |
English PDF |
| GB/T 41870-2022 |
Industrial Internet Platform Enterprise Application Level and PeRFormance Evaluation 工业互联网平台 企业应用水平与绩效评价 |
China National Standards RF |
English PDF |
| GB/T 41732.1-2022 |
Radio frequency identification of animals - Enhanced radio frequency identification tags - Part 1: Air inteRFace 动物射频识别 增强型射频识别标签 第1部分：空中接口 |
China National Standards RF |
English PDF |
| GB/T 41734.3-2022 |
Radio Frequency Identification of Animals Part 3: PeRFormance Evaluation of Radio Frequency Identification Tags Conforming to GB/T 20563 and GB/T 22334 动物射频识别 第3部分：符合GB/T 20563和GB/T 22334的射频识别标签性能评估 |
China National Standards RF |
English PDF |
| GB/T 41812-2022 |
General rules for peRFormance testing of automatic liquid pipetting workstations 自动移液工作站性能检测通则 |
China National Standards RF |
English PDF |
| GB/T 41598-2022 |
Printing technology - Monitors for color proofing - PeRFormance indicators 印刷技术 彩色打样用显示器 性能指标 |
China National Standards RF |
English PDF |
| GB/T 25963-2022 |
Determination of aromatics content in middle distillates containing fatty acid methyl esters - High peRFormance liquid chromatography with differential refractive index detector 含脂肪酸甲酯中间馏分芳烃含量的测定 示差折光检测器高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 41721-2022 |
Small boat navigation lights LED light peRFormance 小艇 航行灯 LED灯的性能 |
China National Standards RF |
English PDF |
| GB/T 42049-2022 |
Rolling bearings for aircraft aiRFrames - Characteristics, dimensions, tolerances and static load ratings 飞机机体用滚动轴承 特性、外形尺寸、公差和额定静负荷 |
China National Standards RF |
English PDF |
| GB/T 41749-2022 |
General requirements for suRFace quality of hot-rolled section steel 热轧型钢表面质量一般要求 |
China National Standards RF |
English PDF |
| GB/T 24644-2022 |
Agricultural and forestry tractors and machinery - Falling object protection devices - Test procedures and peRFormance requirements 农林拖拉机和机械 落物防护装置 试验规程和性能要求 |
China National Standards RF |
English PDF |
| GB/T 19843-2022 |
Industrial Ventilator Jet Fan PeRFormance Test 工业通风机 射流风机性能试验 |
China National Standards RF |
English PDF |
| GB/T 30007-2022 |
Ships and marine technology Guidelines for the evaluation of speed and power peRFormance by analysis of speed trial data 船舶和海上技术 通过分析测速试航数据以确定速度和功率性能的评估导则 |
China National Standards RF |
English PDF |
| GB/T 41970-2022 |
Smart factory CNC machine tool interconnection inteRFace specification 智能工厂数控机床互联接口规范 |
China National Standards RF |
English PDF |
| GB/T 42043-2022 |
Aerospace - Aluminum alloy and copper-clad aluminum conductors for electrical wires - General peRFormance requirements 航空航天 电线的铝合金和铜包铝导体 通用性能要求 |
China National Standards RF |
English PDF |
| GB/T 10095.1-2022 |
Cylindrical gears - ISO tooth suRFace tolerance classification system - Part 1: Definition and permissible values of tooth surface deviations 圆柱齿轮 ISO齿面公差分级制 第1部分：齿面偏差的定义和允许值 |
China National Standards RF |
English PDF |
| GB/T 41863-2022 |
Non-contact water supply appliances-General technical requirements for water-saving peRFormance 非接触式给水器具 节水性能通用技术条件 |
China National Standards RF |
English PDF |
| GB 9706.208-2021 |
Medical electrical equipment –Part 2-8: Particular requirements for the basic safety and essential peRFormance of therapeutic X-ray equipment operating in the range 10 kV to 1 MV 医用电气设备 第2-8部分：能量为10kV至1MV 治疗X射线设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.216-2021 |
Medical electrical equipment—Part 2-16: Particular requirements for the basic safety and essential peRFormance of haemodialysis, haemodiafiltration and haemofiltration equipment 医用电气设备 第2-16部分：血液透析、血液透析滤过和血液滤过设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.229-2021 |
Medical electrical equipment—Part 2-29: Particular requirements for the basic safety and essential peRFormance of radiotherapy simulators 医用电气设备 第2-29部分：放射治疗模拟机的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.239-2021 |
Medical electrical equipment—Part 2-39: Particular requirements for basic safety and essential peRFormance of peritoneal dialysis equipment 医用电气设备 第2-39部分：腹膜透析设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 14391-2021 |
PeRFormance requirements for satellite emergency position indicating radio beacons 卫星紧急无线电示位标性能要求 |
China National Standards RF |
English PDF |
| GB 15216-2021 |
Global maritime distress and safety system—PeRFormance and test requirements for marine search and rescue radar transponder 全球海上遇险和安全系统 搜救雷达应答器性能和测试要求 |
China National Standards RF |
English PDF |
| GB 9706.265-2021 |
Medical electrical equipment—Part 2-65: Particular requirements for the basic safety and essential peRFormance of dental intra-oral X-ray equipment 医用电气设备 第2-65部分：口内成像牙科X射线机的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.243-2021 |
Medical electrical equipment—Part 2-43: Particular requirements for the basic safety and essential peRFormance of X-ray equipment for interventional procedures 医用电气设备 第2-43部分：介入操作X射线设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB/T 40611-2021 |
Plastics—Determination of aerobic biodegradation of non-floating plastic materials in a seawater/ sandy sediment inteRFace—Method by measuring the oxygen demand in closed respirometer 塑料 海水沙质沉积物界面非漂浮塑料材料最终需氧生物分解能力的测定 通过测定密闭呼吸计内耗氧量的方法 |
China National Standards RF |
English PDF |
| GB/T 40544-2021 |
Spacecraft inteRFace requirements document for launch vehicle services 航天器对发射服务接口要求文件 |
China National Standards RF |
English PDF |
| GB/T 40523.1-2021 |
Ships and marine technology—Measurement of changes in hull and propeller peRFormance—Part 1: General principles 船舶与海上技术 船体和螺旋桨性能变化测量 第1部分：总则 |
China National Standards RF |
English PDF |
| GB/T 40505-2021 |
Wet electrostatic precipitator—Methods of peRFormance tests 湿式电除尘器 性能测试方法 |
China National Standards RF |
English PDF |
| GB/T 40479-2021 |
Dimensions and peRFormance requirements of general-purpose half pallets 通用半托盘尺寸及性能要求 |
China National Standards RF |
English PDF |
| GB/T 40523.3-2021 |
Ships and marine technology—Measurement of changes in hull and propeller peRFormance—Part 3: Alternative methods 船舶与海上技术 船体和螺旋桨性能变化测量 第3部分：替代方法 |
China National Standards RF |
English PDF |
| GB/T 40523.2-2021 |
Ships and marine technology—Measurement of changes in hull and propeller peRFormance—Part 2: Default method 船舶与海上技术 船体和螺旋桨性能变化测量 第2部分：默认方法 |
China National Standards RF |
English PDF |
| GB/T 40385-2021 |
Non-destructive testing of steel tubes—Digital radiographic testing of the weld seam of welded steel tubes for the detection of impeRFections 钢管无损检测 焊接钢管焊缝缺欠的数字射线检测 |
China National Standards RF |
English PDF |
| GB/T 40426.3-2021 |
Plastics—Decorative solid suRFacing materials—Part 3:Determination of properties—Non-sheet solid surfacing material 塑料制品 装饰性实体面材 第3部分：性能的测定 非板型实体面材 |
China National Standards RF |
English PDF |
| GB/T 40426.2-2021 |
Plastics—Decorative solid suRFacing materials—Part 2: Determination of properties—Sheet solid surfacing material 塑料制品 装饰性实体面材 第2部分：性能的测定 板型实体面材 |
China National Standards RF |
English PDF |
| GB/T 40426.1-2021 |
Plastics—Decorative solid suRFacing materials—Part 1: Classification and specifications 塑料制品 装饰性实体面材 第1部分：分类和规范 |
China National Standards RF |
English PDF |
| GB/T 40389-2021 |
Sintered metal materials, excluding hardmetals—Measurement of suRFace roughness 烧结金属材料（不包括硬质合金） 表面粗糙度的测定 |
China National Standards RF |
English PDF |
| GB/T 40344.2-2021 |
Vacuum technology—Standard methods for measuring vacuum-pump peRFormance— Part 2：Positive displacement vacuum pumps 真空技术 真空泵性能测量标准方法 第2部分：容积真空泵 |
China National Standards RF |
English PDF |
| GB/T 40344.1-2021 |
Vacuum technology—Standard methods for measuring vacuum-pump peRFormance—Part 1：General description 真空技术 真空泵性能测量标准方法 第1部分：总体要求 |
China National Standards RF |
English PDF |
| GB/T 40327-2021 |
Test methods of guided motion peRFormance for wheeled mobile robot 轮式移动机器人导引运动性能测试方法 |
China National Standards RF |
English PDF |
| GB/T 40325-2021 |
PeRFormance test for rubber sealing device of railway vehicle wheel rolling bearing 轨道车辆轮对滚动轴承橡胶密封装置性能试验 |
China National Standards RF |
English PDF |
| GB/T 40279-2021 |
Test method for thickness of films on silicon wafer suRFace—Optical reflection method 硅片表面薄膜厚度的测试 光学反射法 |
China National Standards RF |
English PDF |
| GB/T 38048.2-2021 |
SuRFace cleaning appliances—Part 2: Dry vacuum cleaners for household or similar use一Methods for measuring the performance 表面清洁器具 第2部分：家用和类似用途干式真空吸尘器 性能测试方法 |
China National Standards RF |
English PDF |
| GB/T 25915.2-2021 |
Cleanrooms and associated controlled environments—Part 2: Monitoring to provide evidence of cleanroom peRFormance related to air cleanliness by particle concentration 洁净室及相关受控环境 第2部分：洁净室空气粒子浓度的监测 |
China National Standards RF |
English PDF |
| GB/T 25915.10-2021 |
Cleanrooms and associated controlled environments—Part 10: Classification of suRFace cleanliness by chemical concentration 洁净室及相关受控环境 第10部分：按化学物浓度划分表面洁净度等级 |
China National Standards RF |
English PDF |
| GB/T 23108-2021 |
Methods for measuring peRFormance for household and similar electric heating pads 家用和类似用途电热垫性能测试方法 |
China National Standards RF |
English PDF |
| GB/T 20829-2021 |
PeRFormance requirements and test method of fixed aerosol fire-extinguishing systems for ships 船舶固定式气溶胶灭火系统性能要求和试验方法 |
China National Standards RF |
English PDF |
| GB/T 18451.2-2021 |
Wind turbines—Power peRFormance measurements of electricity producing 风力发电机组 功率特性测试 |
China National Standards RF |
English PDF |
| GB/T 15969.9-2021 |
Programmable controllers—Part 9: Single-drop digital communication inteRFace for small sensors and actuators (SDCI) 可编程序控制器 第9部分：用于小型传感器和执行器的单点数字通信接口(SDCI) |
China National Standards RF |
English PDF |
| GB/T 12639-2021 |
Methods of in-orbit testing for GEO communication satellite payload peRFormance 地球同步轨道通信卫星有效载荷在轨测试方法 |
China National Standards RF |
English PDF |
| GB/T 40496-2021 |
Determination of antioxidant content in jet fuel—High peRFormance liquid chromatography 喷气燃料中抗氧剂含量的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40486-2021 |
Determination of melittin content in bee venom powder—High peRFormance liquid chromatography 蜂毒干粉中蜂毒溶血肽含量的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40481-2021 |
Dimensions and peRFormance requirements of general-purpose slip sheet pallets for through transit of goods 联运通用滑板托盘尺寸及性能要求 |
China National Standards RF |
English PDF |
| GB/T 40612-2021 |
Plastics—Determination of aerobic biodegradation of non-floating plastic materials in a seawater/sediment inteRFace—Method by analysis of evolved carbon dioxide 塑料 海水沙质沉积物界面非漂浮塑料材料最终需氧生物分解能力的测定 通过测定释放二氧化碳的方法 |
China National Standards RF |
English PDF |
| GB 9706.239-2021 |
Medical electrical equipment—Part 2-39:Particular requirements for basic safety and essential peRFormance of peritoneal dialysis equipment 医用电气设备 第2-39部分：腹膜透析设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.229-2021 |
Medical electrical equipment—Part 2-29:Particular requirements for the basic safety and essential peRFormance of radiotherapy simulators 医用电气设备 第2-29部分：放射治疗模拟机的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.216-2021 |
Medical electrical equipment—Part 2-16: Particular requirements for the basic safety and essential peRFormance of haemodialysis, haemodiafiltration and haemofiltration equipment 医用电气设备 第2-16部分：血液透析、血液透析滤过和血液滤过设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 9706.208-2021 |
Medical electrical equipment—Part 2-8:Particular requirements for the basic safety and essential peRFormance of therapeutic X-ray equipment operating in the range 10 kV to 1 MV 医用电气设备 第2-8部分：能量为10kV至1MV 治疗X射线设备的基本安全和基本性能专用要求 |
China National Standards RF |
English PDF |
| GB 15216-2021 |
Global maritime distress and safety system—PeRFormance and test requirements for marine search and rescue radar transponder 全球海上遇险和安全系统 搜救雷达应答器性能和测试要求 |
China National Standards RF |
English PDF |
| GB 14391-2021 |
PeRFormance requirements for satellite emergency position indicating radio beacons 卫星紧急无线电示位标性能要求 |
China National Standards RF |
English PDF |
| GB/T 40473.3-2021 |
Banking application system—Nonfunctional requirement—Part 3: PeRFormance efficiency 银行业应用系统 非功能需求 第3部分：性能效率 |
China National Standards RF |
English PDF |
| GB/T 40139-2021 |
Measuring method for suRFace areas of materials—Three dimensional area measurement base on hyperspectral imaging 材料表面积的测量 高光谱成像三维面积测量法 |
China National Standards RF |
English PDF |
| GB/T 40229-2021 |
PeRFormance evaluation methods of mobile household robots 家用移动机器人性能评估方法 |
China National Standards RF |
English PDF |
| GB/Z 40295-2021 |
Power peRFormance assessment of electricity producing wave energy converters 波浪能转换装置发电性能评估 |
China National Standards RF |
English PDF |
| GB/T 40286-2021 |
The peRFormance testing method of bi-circulation unit for low-temperature waste heat recovery and utilization 低温双循环余热回收利用装置性能测试方法 |
China National Standards RF |
English PDF |
| GB/T 40268-2021 |
Determination of peRFormance on immunomagnetic material 免疫磁性材料性能检测方法 |
China National Standards RF |
English PDF |
| GB/T 40267-2021 |
Determination of Levodopa in plant derived products—High peRFormance liquid chromatography 植物源产品中左旋多巴的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40217-2021 |
Financial information technology—Data inteRFace of basic old-age insurance fund auditing 财经信息技术 养老保险基金审计数据接口 |
China National Standards RF |
English PDF |
| GB/T 40201-2021 |
Technical requirements for operation peRFormance evaluation of rural domestic sewage treatment facilities 农村生活污水处理设施运行效果评价技术要求 |
China National Standards RF |
English PDF |
| GB/T 40200-2021 |
Method of testing the peRFormance of equipment for industrial organic waste gas purification 工业有机废气净化装置性能测定方法 |
China National Standards RF |
English PDF |
| GB/T 40191-2021 |
Determination of restricted preservatives in toothpaste—High peRFormance liquid chromatography method 牙膏中限用防腐剂的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40190-2021 |
Determination of forbidden bleach in toothpaste—High peRFormance liquid chromatography method 牙膏中禁用漂白剂的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40189-2021 |
Determination of metronidazole and noRFloxacin in toothpaste—High performance liquid chromatography method 牙膏中甲硝唑和诺氟沙星的测定 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40185-2021 |
Determination of 5 kinds of ammonium chloride antibacterial agents in toothpaste—High peRFormance liquid chromatography method 牙膏中5种氯铵类抗菌剂的检测方法 高效液相色谱法 |
China National Standards RF |
English PDF |
| GB/T 40129-2021 |
SuRFace chemical analysis—Secondary ion mass spectrometry—Calibration of the mass scale for a time-of-flight secondary ion mass spectrometer 表面化学分析 二次离子质谱 飞行时间二次离子质谱仪质量标校准 |
China National Standards RF |
English PDF |
| GB/T 40128-2021 |
SuRFace chemical analysis—Atomic force microscopy—Test method for thickness of the two-dimensional layered molybdenum disulfide nanosheets 表面化学分析 原子力显微术 二硫化钼片层材料厚度测量方法 |
China National Standards RF |
English PDF |
| GB/T 40119-2021 |
General technical specifications for RF tag irrigation intelligent control system 射频卡灌溉智能控制系统通用技术条件 |
China National Standards RF |
English PDF |
| GB/T 40116-2021 |
Foil bearings - PeRFormance of hydrodynamic gas journal bearings - Testing of static load capacity, friction coefficient and lifetime 箔片轴承 气体动压径向轴承性能 静态承载能力、摩擦因数和寿命测试 |
China National Standards RF |
English PDF |
| GB/T 40110-2021 |
SuRFace chemical analysis - Determination of surface elemental contamination on silicon wafers by total-reflection X-ray fluorescence (TXRF) spectroscopy 表面化学分析 全反射X射线荧光光谱法（TXRF）测定硅片表面元素污染 |
China National Standards RF |
English PDF |
| GB/T 40109-2021 |
SuRFace chemical analysis - Secondary-ion mass spectrometry - Method for depth profiling of boron in silicon 表面化学分析 二次离子质谱 硅中硼深度剖析方法 |
China National Standards RF |
English PDF |
| GB/T 40094.3-2021 |
Electronic commerce data transaction—Part 3:Data inteRFace specification 电子商务数据交易 第3部分：数据接口规范 |
China National Standards RF |
English PDF |
| GB/T 38051.1-2021 |
Household electric cooking appliances—Part 1：Ranges, ovens, steam ovens and grills—Methods for measuring peRFormance 家用烹饪电器 第1部分：电灶、烤箱、蒸箱和烤架 性能测试方法 |
China National Standards RF |
English PDF |
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