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The coal petrologic automatic analysis is realized mainly by means of random reflectance of vitrinite.
煤岩自动分析主要采用镜质组随机反射率自动测试技术来实现.
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The average reflectance of vitrinite of outcrop sandstones is not large difference from core sandstones '.
露头砂岩与岩芯砂岩的镜质体反射率无较大差别.
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