てい周波 しゅうは公害 こうがいじゃありませんでした
te ishūwa kōgaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 低周波公害

1. Was not low-frequency noise pollution.; Was not low-frequency environmental hazard.

Past/Perfective
Negative
Polite
Terminal Form