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| International Standard Category: Optical measuring instruments |
GB/T 7895-1987 Optical grade synthetic quartz crystal
人造光学石英晶体 ;
| Category No.: | 17.180.30 | Valid Status: | superseded |
| Issued Organization: | State Bureau of Building Material Industry | Issued Date: | 1987-06-05 |
| Implemented Date: | 1988-1-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 7895-2008 Optical grade synthetic quartz crystal |
Superseded Date: | 2009-4-1 |
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