しゅ こく 機構 きこうではありませんでした
shu kokujikikōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 主刻時機構

1. It was not the main engraving mechanism.; It wasn't the primary timing mechanism.

Past/Perfective
Negative
Polite
Formal Register
Computing