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China GB Standards List

 GB/T 4193-1984  
Method for measuring the density of the fine wire and ribbon of tungsten and molybdenum used in electric light sources and vacuumtubes
电真空器件及电光源用细钨丝、钼丝和薄带密度的测试方法
 GB/T 4192-1984  
Method for the determination of the resistivity of tungsten and molybdenum used in electric light sources and vacuumtubes
电真空器件及电光源用钨、钼材料电阻率的测试方法
 GB/T 3455-1982  
electrical characteristics for unbalanced double-current interchange circuits
非平衡双流接口电路的电特性
 GB/T 2413-1980  
Piezoelectric ceramic materials--Measuring methods for determination of volume density
压电陶瓷材料体积密度测量方法

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