浮力 ふりょく調整 ちょうせい装置 そうちではありませんでした
furyokuchō seiso uchidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 浮力調整装置

1. Was not a buoyancy control device.; Was not a buoyancy adjustment device.

Past/Perfective
Negative
Polite
Formal Register