読取よみと書込かきこ開口かいこうじゃなかったです
yomitori kakikomikai kōbujanakattadesu

Noun
Desu Copula

The polite, past negative form of 読取り書込み開口部

1. It wasn't a read/write aperture.; It wasn't a read/write opening.

Past/Perfective
Negative
Polite
Casual Register
Computing