浮遊 ふゆう選鉱 せんこう ほうではありませんでした
fuyūsenkōhōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 浮遊選鉱法

1. Was not flotation.; Was not froth flotation.

Past/Perfective
Negative
Polite
Formal Register