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| 落距; 下落高度 | |||
| 塌落高度 | |||
| 坠落高度; 落锤高度; 落程; 锤落高度 | |||
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height of fall : 6 phrases in 3 subjects |
| Bridge construction | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 3 |
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