乘务员反呼叫班员
calling back from train attendants to control center
乘务员连续工作时间
working duration of locomotive crew
话务员座席系统
Operator Position System OPS
责任话务员座席
responsible operator position
3岁儿童乘员
3-year-old child occupants
被动式乘员安全警报灯
passive restraint tell-tale