しゅ制御 せいぎょ機構 きこうじゃなかったです
shuseigyokikōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 主制御機構

1. Was not the main control mechanism.; Wasn't the primary control system.

Past/Perfective
Negative
Polite
Casual Register
Computing