蹭铁族在地铁站经常可见。

We can often meet subway sneakers on the subway station.

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金刚石砂轮是七十年代初开始研制和应用的，主要用于非铁族金属材料的加工。

Diamond grinding wheel is the development of the early seventies and applications, mainly for non-ferrous metals materials processing.

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它通常为无色透明，但含铁族元素时可具有不同的颜色，如紫争、黄色、 烟灰色等。

It is usually colorless, transparent, but the iron-group elements may have different colors such as purple dispute, yellow, gray smoke, and so on.

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