しゅ制御 せいぎょ装置 そうちではありませんでした
shu seigyosōchidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 主制御装置

1. It was not the main control device.; It wasn't the main control device.

Past/Perfective
Negative
Polite
Formal Register
Computing