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

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。

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So, if we're going to go to the moon, we're going to go to Mars,we want to be able to produce oxygen, structural metals and photovoltaic materials from in situ resources.

如果我们要去月球上，我们要去火星上，我们则必须要制造,氧气，结构金属和光电材料,就在原地制造。

麻省理工公开课 - 固态化学导论课程节选

Many aircraft parts are made from highly specialised metals and other materials: will there be enough of these to go around?

ECONOMIST: Making aircraft

Like the 1970s, Tillman sees this decade as one in which financial assets become less valuable than hard assets such as real estate, metals, raw materials and even collectibles.

FORBES: Magazine Article

Input prices continued to rise, particularly for fuel, other petroleum-based materials, metals, food, and chemicals.

FORBES: Beige Book Paints A Neutral Picture