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| International Standard Category: Abrasives |
JB/T 7990-1998 Super-hard abrasive Micro powder of man-made diamond and borazon
超硬磨料 人造金刚石微粉和立方氮化硼微粉 ;
| Category No.: | 25.100.70 | Valid Status: | superseded |
| Issued Organization: | Ministry of Machine Building | Issued Date: | 1998-07-17 |
| Implemented Date: | 1998-12-1 | Abolished Date: | |
| Superseded Standard.: | JB/T 7990-2012 Superabrasive - Synthetic Diamond and Cubic Boron Nitride Micropowder |
Superseded Date: | 2012-11-1 |
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