 |
| |||
| retainer collar | |||
| stopper; retainer; stop collar | |||
| supporting ring | |||
| thrust ring | |||
| baffle ring | |||
| |||
| check ring | |||
| |||
| stopper ring | |||
| |||
| back-up ring | |||
| |||
| extrution ring | |||
|
挡环 : 46 phrases in 15 subjects |
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