理論 りろん空燃 くうねん じゃなかったです
rironkūnenhijanakattadesu

Noun
Desu Copula

The polite, past negative form of 理論空燃比

1. Wasn't the theoretical air-fuel ratio.; Wasn't the stoichiometric ratio.

Past/Perfective
Negative
Polite
Casual Register