磁気 じきバブルメモリーじゃありませんでした
jikibaburumemoriijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 磁気バブルメモリー

1. Was not magnetic bubble memory.; Wasn't magnetic bubble memory.

Past/Perfective
Negative
Polite
Terminal Form
Computing