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| International Standard Category: Steel profiles |
YB/T 4169-2007 Test method of life for drill steels
钎杆寿命试验方法 ;
| Category No.: | 77.140.70 | Valid Status: | valid |
| Issued Organization: | NDRC | Issued Date: | 2007-08-28 |
| Implemented Date: | 2008-2-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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