自動 じどう火災 かさい報知 ほうち設備 せつびでしょう
jidōkasaihōchisetsubideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 自動火災報知設備

1. Probably an automatic fire alarm system.

Polite
Presumptive
Conjecture