電磁 でんじ妨害 ぼうがいじゃありませんでした
denjibōgaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 電磁妨害

1. It was not electromagnetic interference.; It wasn't electromagnetic interference.

Past/Perfective
Negative
Polite
Terminal Form
Computing