第二种是对于冶金煤或者说焦化煤的需求。
粉末冶金能够制造出精密压缩的组件，对于高容量小形状的产品来说特别经济实用。
Powder Metallurgy produces fully dense pressed components and is very economic for high volume production of small simple shapes.
对于非互溶性组元为主组元的材料研究，以钨基高比重粉末冶金合金为此类材料的典型代表。
For materials with immiscible elements which are main elements, powder metallurgy material of W-based heavy alloy is on a typical example.
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