ねつ硬化 こうか せい樹脂 じゅしでしょう
netsukōka seiju shideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 熱硬化性樹脂

1. Probably a thermosetting resin.

Polite
Presumptive
Conjecture