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| International Standard Category: Welding processes |
Q/CNPC 78-2002 Welding procedures for vertical
管道下向焊接工艺规程;
| Category No.: | 25.160.10 | Valid Status: | valid |
| Issued Organization: | CNPC | Issued Date: | 1900-1-0 |
| Implemented Date: | 2002-7-8 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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