単相 たんそう交流 こうりゅうじゃなかったです
tansōkōryūjanakattadesu

Noun
Desu Copula

The polite, past negative form of 単相交流

1. Wasn't single-phase AC.; Wasn't alternating current.

Past/Perfective
Negative
Polite
Casual Register
Electrical Engineering