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Explosives and Explosive Ordnance Disposal
containing
开业
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工业开采
industrial recovery
开拓
工程
作业
development operation
开拓事业
pioneer an enterprise
至少从19世纪初开始、炸药制造商业已例行测量到炸药起爆速度所用时间为百万分之一秒
Since at least the 1900s, explosives manufacturers have routinely measured time to one millionth of a second for determining the detonation rate of explosives
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