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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 5121.19-2008 |
Methods for chemical analysis of copper and copper alloys - Part 19:Determination of silver content 铜及铜合金化学分析方法 第19部分：银含量的测定 |
China National Standards 19:Determination |
 English PDF |
| GB/T 13477.19-2002 |
Test method for building sealants--Part 19:Determination of change in mass and volume 建筑密封材料试验方法 第19部分:质量与体积变化的测定 |
China National Standards 19:Determination |
English PDF |
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