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| 电器接触装置部件 | |||
| 触点组; 继电器中的接触块 | |||
| 接触块; 光胶盘; 触头组件; 触点 | |||
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contact block : 8 phrases in 4 subjects |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Technology | 5 |
| Volleyball | 1 |
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