絶縁ぜつえん増幅ぞうふくではありませんでした
hizetsuenzōfukukidewārimasendeshita

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
Formal Register
Computing