The tower crane working area shall be barricaded to keep irrelevant people away. 塔吊操作中应听从指挥人员的信号,信号不明或可能引起事故时,应暂停操作。在吊运过程中,塔吊司机对任何人发出“紧急停止”信号应服从。 Crane operators must follow flagman’s instruction. Lifting operation shall be suspended ...