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| 双活塞的 | |||
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| 双活塞 | |||
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double-piston : 16 phrases in 7 subjects |
| Automobiles | 5 |
| Compressors | 1 |
| Electronics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Technology | 4 |
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