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| International Standard Category: Filters, seals and contamination of fluids |
GB/T 3452.4-2020 O-rings for fluid power systems—Part 4:Anti-extrusion rings (back-up rings)
液压气动用O形橡胶密封圈 第4部分：抗挤压环（挡环）;
| Category No.: | 23.100.60 | Valid Status: | valid |
| Issued Organization: | SAMR and SAMR | Issued Date: | 2020-11-19 |
| Implemented Date: | 2020-11-19 | Abolished Date: | |
| Superseded Standard.: | Superseded Date: |
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