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| 斜齿齿轮 | |||
| 人字齿轮; 角形齿齿轮 | |||
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| 角形齿轮; 人字齿轮 | |||
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угловое колесо : 6 phrases in 3 subjects |
| Aviation | 1 |
| General | 1 |
| Technology | 4 |
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