こう分子 ぶんし材料 ざいりょうじゃなかったです
kōbunshizairyōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 高分子材料

1. Wasn't a polymer material.; Wasn't a high molecular material.

Past/Perfective
Negative
Polite
Casual Register