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| 往复式发动机活塞式发动机 | |||
| 往复发动机 | |||
| 往复式发动机; 活塞式发动机 | |||
| 往复式引擎往复式发动机 | |||
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reciprocating engine : 15 phrases in 4 subjects |
| Business | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Technology | 12 |
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