自動 じどう列車 れっしゃ停止 ていし装置 そうちだったら
jidōresshateishisōchidattara

Noun
Da Copula

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

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

Tara Conditional