てい周波 しゅうは公害 こうがいじゃなかったです
te ishūwa kōgaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 低周波公害

1. Wasn't low-frequency noise.; Wasn't low-frequency pollution.

Past/Perfective
Negative
Polite
Casual Register