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Explosives and Explosive Ordnance Disposal
containing
初步
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in specified order only
Chinese
English
初次垮落步距
初次垮落时,自开切眼到支架后排放顶线的距离
distance of first roof fall
初步
评价
tentative valuation
老顶初次来压步距
老顶初次来压时,自开切眼到煤壁的距离
distance of first weighting
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