A safety line attached to a man working over the side B. Used to measure water depth C. Used to slow the headway of a barge D. Used to measure the overhead height of a bridge
A. 正确 B. 错误
A. 车载设备使用信息反馈单 B. 机统-6 C. LKJ系统检测合格证 D. LKJ检-2