复数： signalmen

The signalman 's signature sign is significant to the vacant vacation .

信号员的签字符号对空假期具有重要意义。

The signalman on the ship wigwagged the good news to the other ship .

那艘船上的信号员用旗语向另一艘船发送好消息。

Machine lifting operator and signalman safety basic training course for construction industry .

建造业起重吊索及讯号员基础安全训练课程。

Lifting without a qualified lifting supervisor , rigger and signalman .

吊装时没有专门的监护人、起重工或指吊工。

The signalman had already left the signal box when the collision occurred .

撞车事件发生时，信号员已经离开了信号所。