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preblasting
| examination
| preblasting | |
| expl. | 预爆 |
| examination | |
| hydroel.st. | 检验 |
| interntl.trade. | 验后放行; 审查; 验证 |
| met. | 观察; 分析 |
| qual.cont. | 检试 |
| space | 测验; 检査 |
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| 预爆利用炸药使岩体中的天然裂隙扩大而位移很小的一种爆破方法。该方法成本相对低，可以提高作业生产率 | |||
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preblasting examination : 2 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 2 |
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