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QTZ63B塔式起重机顶升时倾覆引发事故,就其当时使用状态,以及作业人员口述事故经过进行综合分析,经技术检验鉴定,剖析事故原因。
QTZ63B tower crane overturned when the accident led to the state of its use at the time, as well as a comprehensive analysis of the operator’s oral accident, the technical inspection identification, analysis of the cause of the accident.