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| 冲击起动值; 冲击起动风速 (指沙粒在跃移沙粒的冲击作用下才得以起动的临界风速) | |||
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impact threshold : 4 phrases in 2 subjects |
| Desert science | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
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