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

Noun
Desu Copula

The polite, past negative form of 絶縁増幅器

1. Wasn't an isolation amplifier.

Past/Perfective
Negative
Polite
Casual Register
Computing