維持 いじ可能 かのうセル速度 そくどじゃありませんでした
ijikanō serusokudojārimasendeshita

Noun
Desu Copula

The polite, past negative form of 維持可能セル速度

1. Wasn't able to maintain that speed.; Could not maintain that speed.

Past/Perfective
Negative
Polite
Terminal Form
Computing