磁気 じきドラム記憶 きおく装置 そうちであれば
jikidoramukiokusōchideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 磁気ドラム記憶装置

1. If it is a magnetic drum memory device; Were it a magnetic drum memory device

Ba Conditional
Computing