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| 对向活塞对置活塞 | |||
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| 对动活塞 | |||
| 双动活塞; 对置活塞 | |||
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| 对置活塞 | |||
| opposed pistons: 13 phrases in 6 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Engineering geology | 1 |
| Nautical | 1 |
| Rail transport | 1 |
| Technology | 7 |
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