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| International Standard Category: Moulding equipment |
GB/T 7143-1986 Methods for chemical analysis of silica sand for foundry
铸造用硅砂化学分析方法 ;
| Category No.: | 25.120.30 | Valid Status: | superseded |
| Issued Organization: | National Bureau of Standards | Issued Date: | 1986-01-02 |
| Implemented Date: | 1987-10-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 7143-2010 Methods for chemical analysis of silica sand for foundry |
Superseded Date: | 2011-2-1 |
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