重厚 じゅうこう長大 ちょうだい産業 さんぎょうではありませんでした
jūkōchōdaisangyōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 重厚長大産業

1. Was not a heavy, large-scale industry.; Was not a substantial, major industry.

Past/Perfective
Negative
Polite
Formal Register