2021 year China issued GB standards list


	GB/T 31838.6-2021 Solid insulating materials—Dielectric and resistive properties—Part 6:Dielectric properties(AC method)—Relative permittivity and dielectric dissipation factor(frequencies 0.1Hz～10 MHz) 固体绝缘材料介电和电阻特性第6部分：介电特性（AC方法）相对介电常数和介质损耗因数（频率0.1Hz~10MHz）
	GB/T 20370-2021 Guideline for enzyme preparations classification 酶制剂分类导则
	GB/T 40374-2021 Hardmetals—Determination of lead and cadmium content—Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry 硬质合金化学分析方法铅量和镉量的测定火焰原子吸收光谱法和电感耦合等离子体原子发射光谱法
	GB/T 39833-2021 Test method for coal combustion characteristics—One-dimensional furnaces method 煤的燃烧特性测定方法一维炉法
	GB/T 40376-2021 Cement based binder for interior decoration 室内装修用水泥基胶结料
	GB/T 39966-2021 Guidelines for environmental performance evaluation in waste resource multiple utilization enterprises 废弃资源综合利用业环境绩效评价导则
	GB/T 39832-2021 Gardening machinery—Powered material-collecting systems—Safety 园艺机械物料动力收集装置安全
	GB/T 30027-2021 Round steel short link chains for lifting purposes—Fine tolerance hoist chains for hand operated chain hoists—Grade VH 起重用钢制短环链手动链式葫芦用高精度链 VH级
	GB/T 39827.2-2021 Plastics -- Post-consumer poly(ethylene terephthalate)(PET) bottle recyclates -- Part 2: Preparation of test specimens and determination properties 塑料用过的聚对苯二甲酸乙二醇酯(PET)瓶回收物第2部分：试样制备和性能测定
	GB/T 40378-2021 Technical specification of treatment equipments for chemistry laboratory waste water 化学实验室废水处理装置技术规范
	GB/T 28951-2021 Forest certification in China—Forest management 中国森林认证森林经营
	GB/T 40380.1-2021 Metallic powders—Determination of apparent density and flow rate at elevated temperatures—Part 1: Determination of apparent density at elevated temperatures 金属粉末高温时松装密度和流速的测定第1部分：高温时松装密度的测定
	GB/T 25281-2021 The clothing with safety sign for the working people on roads 道路作业人员安全标志服
	GB/T 28774-2021 Synchronous belt drives—Belts with T trapezoidal profile system 同步带传动 T型梯形齿同步带
	GB/T 40072-2021 Strength test method for submersible metallic framework 潜水器金属框架强度试验方法
	GB/T 25388.2-2021 Wind turbines generator system—Double-fed converter—Part 2: Test method 风力发电机组双馈式变流器第2部分：试验方法
	GB/T 40073-2021 External pressure strength test procedure for metal pressure hull of submersibles 潜水器金属耐压壳外压强度试验方法
	GB/T 28170.2-2021 Information technology—Computer graphics and image processing—Extensible 3D(X3D)—Part 2: Scene access interface(SAI) 信息技术计算机图形和图像处理可扩展三维组件(X3D) 第2部分：场景访问接口(SAI)
	GB/T 28267.1-2021 Steel cord conveyor belts—Part 1:Design,dimensions and mechanical requirements for conveyor belts for general use 钢丝绳芯输送带第1部分：普通用途输送带的设计、尺寸和机械要求
	GB/T 15242.3-2021 Dimensions series of rod and piston dynamic seals for hydraulic cylinders-Part 3:Dimensions and tolerances of groove for co-axial seals 液压缸活塞和活塞杆动密封装置尺寸系列第3部分：同轴密封件沟槽尺寸系列和公差

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