応力 おうりょく腐食 ふしょくじゃありませんでした
ōryokufushokujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 応力腐食

1. Was not stress corrosion.; Did not involve stress corrosion.

Past/Perfective
Negative
Polite
Terminal Form