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| International Standard Category: Physicochemical methods of analysis |
JB/T 9221-1999 Test method for effective bentonite and effective seacoal aontent in green molding sand
铸造用湿型砂有效膨润土及有效煤粉 试验方法;
| Category No.: | 71.040.50 | Valid Status: | superseded |
| Issued Organization: | Issued Date: | 1999-6-24 | |
| Implemented Date: | 2000-6-24 | Abolished Date: | |
| Superseded Standard.: | JB/T 9221-2017 Test method for effective bentonite and effective seacoal content in green molding sand |
Superseded Date: | 2017-10-1 |
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