浮遊 ふゆう選鉱 せんこう ほうじゃありませんでした
fuyūsenkōhōjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 浮遊選鉱法

1. Was not froth flotation.; Was not a froth flotation method.

Past/Perfective
Negative
Polite
Terminal Form