平均 へいきん故障 こしょう間隔 かんかくではありませんでした
heikinkoshōkankakudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 平均故障間隔

1. Was not mean time between failures.; Was not the average time between failures.

Past/Perfective
Negative
Polite
Formal Register
Computing