浙江省义乌市在城区建设中 ,仅用 6天时间 ,成功地爆破拆除了七栋 5～ 7层的楼房 ,拆除总建筑面积达140 0 0余平方米。被拆除的楼房位于义乌市市政府大楼前方 ,原为繁华商业区 ,其中 7号楼高 7层 ,距旁边要保留的商业用房仅 3.5ｍ ,楼前高压线、变压器和通讯用设施有多处。七栋 In the construction of the urban area of ​​Yiwu City, Zhejiang Province, it took only 6 days to successfully demolish seven 5 to 7-story buildings and demolished a total construction area of ​​140 million square meters. The demolished building is located in front of the Yiwu City Government Building and was originally a bustling commercial area. The 7th building is 7 storeys high, and only 3.5m away from the commercial buildings to be reserved. There are several high voltage lines, transformers and communication facilities in front of the building. . Seven buildings