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| 联锁部件 | |||
| 联锁闭塞区间 | |||
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| 联锁闭塞区间【铁】; 联锁块 (体); 联锁扣搭块; 扣搭块; 咬接砌块 | |||
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interlocking blocks : 15 phrases in 3 subjects |
| Communications | 1 |
| Oil / petroleum | 1 |
| Technology | 13 |
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