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| 靠背轮; 盘式耦合器 | |||
| 圆盘联轴器 | |||
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disc coupling : 7 phrases in 5 subjects |
| Automobiles | 3 |
| Aviation | 1 |
| Compressors | 1 |
| Hydroelectric power stations | 1 |
| Technology | 1 |
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