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| 升降孔升降跨; 升降桥孔 | |||
| 提升式桥孔; 升降式桥孔; 提升式桥跨; 升降式桥孔; 提升式桥孔 | |||
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lift span : 5 phrases in 2 subjects |
| Bridge construction | 2 |
| Technology | 3 |
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