列车接近报警器
train approach warning device
Train approach annunciator
列车接近报警系统
train approaching alarm system
列车接近报警装置
train approach warning device
列车接近防护
train approaching protection
列车接近警报器
train approach warning device
列车接近通知
radio data service for train approaching announcement
接近度(ND)对比法
Nearing degree(ND) contrast method