読取 よみと書込 かきこみヘッドじゃなかったです
yomitorikakikomiheddojanakattadesu

Noun
Desu Copula

The polite, past negative form of 読取り書込みヘッド

1. Wasn't the read/write head.

Past/Perfective
Negative
Polite
Casual Register
Computing