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Explosives and Explosive Ordnance Disposal
containing
使命
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平均使用寿命
为工程施工需要而设置的加工、制造、修配和动力供应等临时生产设施
average useful life
革命性技术变革虽然能使煤炭开采率逐渐上升、意义重大、但距今尚有一段距离
R-technologic reforms, which can bring about profound, step-junction increases in coal recovery, are still way off
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