時差 じさ しき信号 しんごうではありませんでした
jisashi kishin gōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 時差式信号

1. It was not a time-difference-based signal.; It was not a staggered signal.

Past/Perfective
Negative
Polite
Formal Register