腐食 ふしょく銅版 どうばんではありませんでした
fushokudōbandewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 腐食銅版

1. Was not corroded copper plate.; Was not a corroded copper plate.

Past/Perfective
Negative
Polite
Formal Register