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Professional Standard Category: National Standard |
Category No.: | GB | Valid Status: | superseded |
Issued Organization: | China State Bureau of Technical Supervision | Issued Date: | 1993-02-06 |
Implemented Date: | 1993-10-1 | Abolished Date: | 2010-06-01 |
Superseded Standard.: | GB/T 14139-2009 Silicon epitaxial wafers |
Superseded Date: | 2010-6-1 |
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