平均 へいきん故障 こしょう間隔 かんかくじゃなかったです
heikinkoshōkankakujanakattadesu

Noun
Desu Copula

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

1. Wasn't the mean time between failures.; Wasn't the average time between failures.

Past/Perfective
Negative
Polite
Casual Register
Computing