2021 year China issued GB standards list


	GB/T 18691.2-2021 Agricultural irrigation equipment—Irrigation valves—Part 2: Isolating valves 农业灌溉设备灌溉阀第2部分：隔离阀
	GB/T 19011-2021 Guidelines for auditing management systems 管理体系审核指南
	GB/T 40433-2021 Technical specifications of combined power source for electric vehicles 电动汽车用混合电源技术要求
	GB/T 40742.5-2021 Geometrical product specifications (GPS)—Geometrical precisionverification—Part 5:Estimation of uncertainty of measurement for geometrical characteristics verification 产品几何技术规范（GPS）几何精度的检测与验证第5部分:几何特征检测与验证中测量不确定度的评估
	GB/T 14949.12-2021 Manganese ores - Determination of combined water content - Gravimetric method 锰矿石化合水含量的测定重量法
	GB/T 28504.3-2021 Rare earth doped optical fibre—Part 3:Characteristics of double-cladding erbium-ytterbium co-doped optical fibre 掺稀土光纤第3部分：双包层铒镱共掺光纤特性
	GB/T 21227-2021 AC loss measurements—Magnetometer methods for hysteresis loss in superconducting multifilamentary composites 交流损耗测量多丝复合超导材料磁滞损耗的磁强计测量法
	GB/T 7739.5-2021 Methods for chemical analysis of gold concentrates—Part 5: Determination of lead content 金精矿化学分析方法第5部分：铅量的测定
	GB/T 40709-2021 Technical requirements for swell compensator of trailing suction hopper dredger 耙吸挖泥船波浪补偿器技术要求
	GB/T 3883.209-2021 Safety of motor-operated hand-held, transportable and garden tools - Part 209: Particular requirements for hand-held tappers and threaders 手持式、可移式电动工具和园林工具的安全第209部分：手持式攻丝机和套丝机的专用要求
	GB/T 22178-2021 Oxadiazon emulsifiable concentrates 噁草酮乳油
	GB/T 15972.49-2021 Specifications for optical fibre test methods—Part 49: Measurement methods and test procedures for transmission characteristics—Differential mode delay 光纤试验方法规范第49部分：传输特性的测量方法和试验程序微分模时延
	GB/T 1927.12-2021 Test methods for physical and mechanical properties of small clear wood specimens—Part 12:Determination of strength in compression perpendicular to grain 无疵小试样木材物理力学性质试验方法第12部分：横纹抗压强度测定
	GB/T 1927.8-2021 Test methods for physical and mechanical properties of small clear wood specimens—Part 8: Determination of swelling 无疵小试样木材物理力学性质试验方法第8部分：湿胀性测定
	GB/T 39831-2021 Hydraulic fluid power—Four-port modular stack valves and four-port directional control valves, sizes 02, 03, 05, 07, 08 and 10—Clamping dimensions 液压传动规格02、03、05、07、08和10的四油口叠加阀和方向控制阀夹紧尺寸
	GB/T 40654-2021 Intelligent manufacturing—Virtual factory information model 智能制造虚拟工厂信息模型
	GB/T 31016-2021 General technical specification for mobile laboratory of sample collection and treatment 样品采集与处理移动实验室通用技术规范
	GB/T 38624.2-2021 Internet of things—Gateway—Part 2: Technical requirements of gateway accessing the public telecommunication network 物联网网关第2部分：面向公用电信网接入的网关技术要求
	GB/T 20275-2021 Information security technology -- Technical requirements and testing and evaluation approaches for network-based intrusion detection system 信息安全技术网络入侵检测系统技术要求和测试评价方法
	GB/T 15972.10-2021 Specifications for optical fibre test methods-Part 10:Measurement methods and test procedures-General and guidance 光纤试验方法规范第10部分：测量方法和试验程序总则

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