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| 变速〔传动〕 齿轮速比 | |||
| 变速齿轮速比 | |||
| 变换齿轮速比 | |||
| 交换齿轮速比 | |||
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| 变速比 | |||
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change gear ratio : 4 phrases in 3 subjects |
| Automobiles | 2 |
| Shipbuilding | 1 |
| Technology | 1 |
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