高圧 こうあつ酸素 さんそ しつじゃありませんでした
kōatsusan soshitsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 高圧酸素室

1. Was not a hyperbaric chamber.; Was not a high-pressure oxygen room.

Past/Perfective
Negative
Polite
Terminal Form