周波 しゅうは すう変換 へんかん装置 そうちでしょう
shūhasūhenkansōchideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 周波数変換装置

1. Frequency converter, likely.; Probably a frequency converter.

Polite
Presumptive
Conjecture