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| 重吊杆 | |||
| 重型吊杆 | |||
| 重型吊杆; 隧道钻车臂 | |||
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jumbo boom : 7 phrases in 4 subjects |
| Architecture | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 1 |
| Technology | 4 |
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