読取 よみと書込 かきこ開口 かいこう でしょう
yomitori kakikomikai kōbudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 読取り書込み開口部

1. Read/write aperture; Probably a read/write aperture

Polite
Presumptive
Conjecture
Computing