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| International Standard Category: Inch screw threads |
GB/T 20669-2006 Unified screw threads - Profiles
统一螺纹 牙型 ;
| Category No.: | 21.040.20 | Valid Status: | valid |
| Issued Organization: | AQSIQ; SAC | Issued Date: | 2007-03-26 |
| Implemented Date: | 2007-7-1 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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