環状 かんじょう鉄心 てっしんじゃありませんでした
kanjōtesshinjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 環状鉄心

1. Was not a toroidal core.; Was not a ring-core.

Past/Perfective
Negative
Polite
Terminal Form