圧力 あつりょく調整 ちょうせい じゃありませんでした
atsuryokuchōsei kija arimasendeshita

Noun
Desu Copula

The polite, past negative form of 圧力調整器

1. Was not a pressure regulator.; Was not adjusting the pressure.

Past/Perfective
Negative
Polite
Terminal Form