垂直すいちょく磁気じき記録きろくじゃありませんでした
suichokujikikirokujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 垂直磁気記録

1. Was not perpendicular magnetic recording.; Wasn't perpendicular magnetic recording.

Past/Perfective
Negative
Polite
Terminal Form
Computing