“coal preparation”的概念、定义、翻译、参考文献-科学参考

单词	coal preparation
释义	coal preparation Encyclopedia 理学〔煤田普查勘探〕释 coal preparation选煤利用煤与其他物质的不同物理、物理-化学性质，在选煤厂内用机械方法去除混在原煤中的杂质，把它分成不同质量、规格的产品的过程。
随便看	line of contact line of convergence line of current line of curvature line of cusps line of declination line of degeneration of type line of discontinuity line of electric force line of flow line of force line of horizon line of integration line of intersection line of inversion line of latitude line of longitude line of magnetic induction line of magnetization line of nodes line of position line of projection line of regression line of right ascension line of sight

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