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| International Standard Category: Seals, glands |
JB/T 7757.2-2006 The rubber O - ring for mechanical seal
机械密封用Ｏ形橡胶圈 ;
| Category No.: | 21.14 | Valid Status: | superseded |
| Issued Organization: | NDRC | Issued Date: | 2006-12-31 |
| Implemented Date: | 2007-7-1 | Abolished Date: | |
| Superseded Standard.: | JB/T 7757-2020 |
Superseded Date: | 2021-4-1 |
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