In order to demolish an old internally frame reinforced four story building complex in the city, at first, the directional blast was adopted and the blasting drills had been practised.
为了快速拆除杭州市内一幢内部框架加固的四层古式建筑楼房，原设计采用向南侧定向坍塌的爆破方案，并已钻眼确定爆破缺口。
In order to demolish an old internally frame reinforced four story building complex in the city, at first, the directional blast was adopted and the blasting drills had been practised.
为了快速拆除杭州市内一幢内部框架加固的四层古式建筑楼房，原设计采用向南侧定向坍塌的爆破方案，并已钻眼确定爆破缺口。
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