货物列车在站停车时,司机必须使列车保持制动状态__。发车前,司机__,确认发车条件具备后,方可起动列车
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双管供风旅客列车在区间发生故障需双管改单管供风时,由车辆乘务员通知司机向列车调度员__提出在前方站停车处理的请求,并通知司机以不超过__km/h速度运行至前方站
AnSEScanbeused()
A. as soon as it has been properly installed on board
B. before it was commissioned
C. after successful commissioning
D. on the scheduled date
单机挂车时,在区间被迫停车后的防护工作由机车乘务组负责,开车前应确认附挂辆数和制动主管__是否良好