浮力 ふりょく調整 ちょうせい装置 そうちでしょう
furyokuchō seiso uchideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 浮力調整装置

1. Buoyancy adjustment device, probably.; It will likely be a buoyancy adjustment device.

Polite
Presumptive
Conjecture