These findings are significant in understanding of the characteristics of coal petrographic constituents and and enr.

煤岩组分和煤变质程度是影响煤层生储气能力的主控因素.

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Through accurate description and dissection of deltaic front outcrops, 11 petrographic facies types are established.

通过对三角洲前缘露头的精细描述和解剖, 建立了研究区11种岩石相类型.

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Effect of petrographic composition on coal spontaneous combustion has been studied in this report.

本文研究煤岩成分对煤炭自燃的影响,认为镜质组自燃,壳质组和惰性组不易自燃.

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The chemical composition petrographic analysis and dispersing property of kinds of bauxitic clay are compared.

对比研究了几种铝矾土的化学组成、相组成和分散性能.

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