放射 ほうしゃ せん重合 じゅうごうじゃなかったです
hōshasenjūgōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 放射線重合

1. Wasn't radiation polymerization.; Wasn't radiopolymerized.

Past/Perfective
Negative
Polite
Casual Register