繊維 せんい強化 きょうかプラスチックでしょう
sen'i kyōka purasuchikkudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 繊維強化プラスチック

1. Fiber-reinforced plastic, likely.; Probably fiber-reinforced plastic.

Polite
Presumptive
Conjecture