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煤矿物学
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煤矿物学
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煤矿物学
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mineralogy of coal
煤矿物学
研究煤中矿物质的含量、化学成分、内部结构、外表形态、物理性质、成因、产状,探讨煤中矿物质形成的时间和空间分布规律、对成煤环境和区域地质历史演化的指示意义及其工业用途等的学科。
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universe's age, cosmic age
Universidad de El Salvador
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