1. 出站信号机：出站信号机(starting signal) 指示列车能否由车站向区间发车的信号机. 车站的正线和到发线上,应装设出站信号机. 在自动闭塞和半自动闭塞区段,出站信号机开放是占用区间的凭证.

2. 起动信号：starting servo-motor == 起动伺服马达 | starting signal == 起动信号 | starting switch == 起动开关

3. 启动信号：8.52 指示灯display lamp | 8.53 启动信号starting signal | 8.54 停车信号cutoff signal

4. 出发号志：starting point 起点 | starting signal 出发号志 | starting step 起步 ,首阶

noun

1. a signal to begin (as in a race)

e.g. the starting signal was a green light
the runners awaited the start

Synonym: start