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| 人字齿轮 | |||
| 人字螺旋齿轮 | |||
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| 人字【双螺旋】齿轮 | |||
| 双螺旋齿轮; 双人字齿轮 | |||
| "人"字形齿轮; 人字形齿轮 | |||
| 人字齿轮 | |||
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| 人字齿轮 | |||
| 双螺旋齿轮 | |||
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double-helical gear : 10 phrases in 5 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Compressors | 1 |
| Metallurgy | 1 |
| Technology | 6 |
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