Ferrous metals are those which contain iron.

黑色金属是含铁的金属。

Carbon is found in almost all ferrous metals.

几乎所有的黑色金属中都含有碳。

It works with herring, but will it work with ferrous metals?

它对鲱鱼有用，可是对铁金属也有用吗？

Welders operate welding equipment to weld ferrous and non-ferrous metals.

焊工操作焊接设备焊接亚铁金属和有色金属。

The ferrous metals can be classified into steels, cast irons, and wrought irons.

黑色金属可分为钢，铸铁和熟铁。