色灯电锁器联锁 color-light signals: 色灯信号interlocking of signals: 信号联锁interlocking signals: 连锁性信号electric interlocking: 电气联锁, 电气集中联锁, 电气集中light signals: 指向信号灯下载手机词典可随时随地查词查翻译