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triple seal
| piston ring
| triple seal | |
| oil | 三重密封 |
| piston ring | |
| avia. | 活塞杆 |
| compr. | 涨圈 |
| dril. | 活塞胀圈 |
| met. | 活塞环 |
| oil | 活塞环 |
| plast. | 活塞圈 |
| tech. | 压缩环; 胀圈 |
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| 三重密封 | |||
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triple seal piston ring : 3 phrases in 1 subject |
| Technology | 3 |
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