自動 じどう列車 れっしゃ停止 ていし装置 そうちであれば
jidōresshateishisōchideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 自動列車停止装置

1. If it were an automatic train stop device.; If it is an automatic train stop device.

Ba Conditional