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阶梯形活塞
| 环
| 阶梯形活塞 | |
| oil | stepped piston |
| 环 | |
| chem. | cyclo- |
| hydroel.st. | ring; loop |
| manag. | collar |
| met. | kink; thimble; yoke |
| oil | cycle |
| |||
| stepped piston | |||
| step piston | |||
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阶梯形活塞 : 1 phrase in 1 subject |
| Automobiles | 1 |
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