black iron

Noun

uncountable

Weights as opposed to exercise machines.

Japanese Meaning

運動用マシンとは対照的に、フリーウエイトとして用いられる鉄製の重り（ダンベルやバーベルなど）を指す。

She loaded the barbell with black iron and started her set.

彼女はバーベルにフリーウェイトを載せてセットを始めた。

Sense（1）

Weights as opposed to exercise machines.

The problem we had was not the concept or the product, but what to do with the space. To put a beauty salon alongside a black iron gym was ludicrous.