冷熱 れいねつ発電 はつでんじゃありませんでした
reinetsuhatsudenjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 冷熱発電

1. Was not geothermal power generation.; Was not a geothermal power plant.

Past/Perfective
Negative
Polite
Terminal Form