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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 42638-2023 |
Method for direct measurement of coal seam gas drainage radius in underground coal mine - Drainage volume method {译} 煤矿井下煤层瓦斯抽采半径直接测定方法 抽采量法 |
China National Standards Method direct measurement |
 English PDF |
| GB/T 21548-2021 |
Methods of measurement of the high speed semiconductor lasers directly modulated for optical fiber communication systems 光通信用高速直接调制半导体激光器的测量方法 |
China National Standards Method direct measurement |
English PDF |
| GB/T 7274-2015 |
Methods for the measurement of direct inter-electrode capacitances of electronic tubes and valves 电子管极间电容测试方法 |
China National Standards Method direct measurement |
English PDF |
| GB/T 22159.2-2012 |
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 2: Direct method for determination of the dynamic stiffness of resilient supports for translatory motion 声学与振动 弹性元件振动-声传递特性实验室测量方法 第2部分：弹性支撑件平动动刚度的直接测量方法 |
China National Standards Method direct measurement |
English PDF |
| GB/T 22159.3-2008 |
Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 3: Indirect method for determination of the dynamic stiffness of resilient supports for translatory motion 声学与振动 弹性元件振动 声传递特性实验室测量方法 第3部分：弹性支撑件平动动刚度的间接测量方法 |
China National Standards Method direct measurement |
English PDF |
| GB/T 21548-2008 |
Methods of measurement of the high speed semiconductor lasers directly modulated for optical fiber communication systems 光通信用高速直接调制半导体激光器的测量方法 |
China National Standards Method direct measurement |
English PDF |
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