尝试性地对乌拉山脉金矿田中钾长石进行了偏振光下的吸收光谱研究，结果表明，含矿与不含矿钾长石的吸收光主普有着本质的差异，钾长石的......

One of the most important problems facing the gold industry is that the placer and free milling gold ores are almost ter......

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