 |
| |||
| oil retainer; oil seal ring; oil sealing ring | |||
| oil guard-ring | |||
| oil ring | |||
| oil control ring | |||
| oil retainer (thrower); oil seal | |||
| |||
| oil retainer ring | |||
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护 油 圈 : 10 phrases in 3 subjects |
| Chemistry | 1 |
| Oil / petroleum | 1 |
| Technology | 8 |
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