平均 へいきん故障 こしょう時間 じかんじゃなかったです
heikinkoshōjikanjanakattadesu

Noun
Desu Copula

The polite, past negative form of 平均故障時間

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

Past/Perfective
Negative
Polite
Casual Register
Computing