降圧 こうあつ変圧 へんあつ じゃなかったです
kōatsuhen atsukijanakattadesu

Noun
Desu Copula

The polite, past negative form of 降圧変圧器

1. Wasn't a step-down transformer.

Past/Perfective
Negative
Polite
Casual Register
Electrical Engineering