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| 隔离环 | |||
| 泵缸套扶正圈; 套环 | |||
| 圆顶天窗圈梁; 液封环; 水泵的密封环; 灯笼式环; 润滑环 | |||
| lantern ring: 3 phrases in 2 subjects |
| Aviation | 1 |
| Technology | 2 |
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