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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 33156-2016 |
Precision welded tubes for gas spring 气弹簧用精密焊接钢管 |
China National Standards Precision welded tubes |
 English PDF |
| GB/T 31943-2015 |
Continuously cold rolled steel strips for Precision welded tubes 精密焊接钢管用冷连轧钢带 |
China National Standards Precision welded tubes |
English PDF |
| GB/T 24187-2009 |
Cold-drawn precision single welded steel tubes 冷拔精密单层焊接钢管 |
China National Standards Precision welded tubes |
English PDF |
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