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| 拨轨用继电器铁路 | |||
| 轨道继电器 | |||
| 拨轨继电器 | |||
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track relay : 22 phrases in 9 subjects |
| Aviation | 2 |
| Cartography | 1 |
| Communications | 4 |
| Earth sciences | 1 |
| Rail transport | 3 |
| Space | 2 |
| Sports | 2 |
| Technology | 6 |
| United States | 1 |
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