It is a difficult problem to demolish large building bases by controlled blasting techniques within a narrow area of concentration plant.
在选矿车间的狭小范围内，用控爆技术拆除大型构筑物的基础是一大难题。
It is a difficult problem to demolish large building bases by controlled blasting techniques within a narrow area of concentration plant.
在选矿车间的狭小范围内，用控爆技术拆除大型构筑物的基础是一大难题。
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