通过静压法中的直接变换法，纯净的多晶石墨棒可以在短时间内转化为多晶金刚石。
Ultra hard polycrystalline diamond can be synthesized from graphite by direct conversion under static high pressure.
为了节约能源、改善操作环境，湘钢高线、棒材厂在加热炉试用了多晶莫来石纤维。
The properties of homemade new type insulation material made of polycrystalline mullite fibre and its successfully application in continuous reheating furnace are discussed.
为了节约能源、改善操作环境，湘钢高线、棒材厂在加热炉试用了多晶莫来石纤维。
In order to save energy sources and improve operational condition, the polycrystalline mullite fibre was tried using for the heating furnace of wire rod and bar mill in Xianggang.
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