training light signal的意思|示意

美 / / 英 / /

训练灯信号

列车打号志 ... training levee 导流堤 training light signal 列车打号志 training wall 导墙，顺坝，导堤，顺堤，防潮墙 ...

灯光导标 ... 不发光导标 unlighted beacon 灯光导标 guiding light; training light signal 定向导标 directional beacon ...