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| 反向转撤器; 顺向道岔【铁】; 背向道岔; 背向转辙器 | |||
| trailing point: 7 phrases in 6 subjects |
| Communications | 1 |
| Computer networks | 1 |
| Electronics | 1 |
| Rail transport | 1 |
| Sports | 1 |
| Technology | 2 |
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