2021 year China issued GB standards list


	GB/T 4721-2021 General rules for rigid copper clad laminates for printed circuits 印制电路用刚性覆铜箔层压板通用规则
	GB/T 40819-2021 Aeolian vibration fatigue test method for overhead conductors and cables 架空线缆微风振动疲劳试验方法
	GB/T 40853.1-2021 High frequency inductive components—Electrical characteristics and measuring method—Part 1:Nanohenry range chip inductor 高频感性元件电特性及其测量方法第1部分：纳亨级片式电感器
	GB/T 39844-2021 Reliability growth—Statistical test and estimation methods 可靠性增长统计试验和评估方法
	GB/T 8361-2021 Ultrasonic testing method for the surface of cold drawn round steel 冷拉圆钢表面超声检测方法
	GB/T 40581-2021 Calculation specification for power system security and stability 电力系统安全稳定计算规范
	GB/T 40565.4-2021 Connections for hydraulic fluid power—Quick-action couplings—Part 4: Screw connection type at 72 MPa 液压传动连接快换接头第4部分：72 MPa螺纹连接型
	GB/T 15039-2021 Standard lamps of luminous intensity and total luminous flux 发光强度、总光通量标准灯泡
	GB/T 39865-2021 Method for measuring refractive index of uniaxial optical crystals 单轴晶光学晶体折射率测量方法
	GB/T 21021.4-2021 Intermodulation level measurement for passive RF and microwave devices -- Part 4: Measurement of passive intermodulation in coaxial cables 无源射频和微波元器件的互调电平测量第4部分：同轴电缆的无源互调测量
	GB/T 39818-2021 Plastics—Thermosetting moulding materials—Determination of shrinkage 塑料热固性模塑材料收缩率的测定
	GB/T 4942-2021 Degrees of protection provided by the integral design of rotating electrical machines (IP code)—Classification 旋转电机整体结构的防护等级（IP代码）分级
	GB/T 40852.1-2021 High frequency inductive components—Non-electrical characteristics and measuring methods—Part 1:Fixed,surface mounted inductors for use in electronic and telecommunication equipment 高频感性元件非电特性及其测量方法第1部分：电子和通信设备用表面安装固定电感器
	GB/T 40821-2021 Test specification for heat exchange system of solar thermal power plant 太阳能热发电站换热系统检测规范
	GB/T 40006.9-2021 Plastics—Recycled plastics—Part 9:Poly(ethylene terephthalate) (PET) materials 塑料再生塑料第9部分：聚对苯二甲酸乙二醇酯(PET)材料
	GB/T 39815-2021 Test method for scratch resistance of ultrathin glass 超薄玻璃抗划伤性能试验方法
	GB/T 5169.20-2021 Fire hazard testing for electric and electronic products—Part 20: Surface spread of flame—Summary and relevance of test methods 电工电子产品着火危险试验第20部分：火焰表面蔓延试验方法概要和相关性
	GB/T 40801-2021 Welding procedure qualification tests for titanium,zirconium and their alloys 钛、锆及其合金的焊接工艺评定试验
	GB/T 39946-2021 Determination of prohibited Para Red in lip cosmetics -- High performance liquid chromatography 唇用化妆品中禁用物质对位红的测定高效液相色谱法
	GB/T 39900-2021 General technical requirements for the road traffic signal control system 道路交通信号控制系统通用技术要求

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