絶縁 ぜつえん増幅 ぞうふく じゃなかったです
hizetsuenzōfukukijanakattadesu

Noun
Desu Copula

The polite, past negative form of 非絶縁増幅器

1. Was not a non-isolating amplifier.

Past/Perfective
Negative
Polite
Casual Register
Computing