こう性能 せいのう減水 げんすい ざいでしょう
kōseino ugen suizaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 高性能減水剤

1. High-performance water reducer, likely.; Probably a high-performance water reducer.

Polite
Presumptive
Conjecture