完全 かんぜん放射 ほうしゃ たいじゃなかったです
kanzenhōshataijanakattadesu

Noun
Desu Copula

The polite, past negative form of 完全放射体

1. Was not a perfect radiator.; Wasn't a perfect radiator.

Past/Perfective
Negative
Polite
Casual Register
Physics