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| 操作绝缘杆 | |||
| 开关绝缘棒 | |||
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| 尖轨连接杆; 道岔拉杆; 转辙杆 | |||
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switching rod : 9 phrases in 3 subjects |
| Communications | 2 |
| Electronics | 2 |
| Technology | 5 |
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