煤阶的英文

coal rank

coal step

• 煤:    coal
• 阶:    steps; stairs
• 低煤阶:    low coal rank

例句与用法

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1. The differences between high and low coal rank reservoirs are analyzed from such aspects as the conditions of the coalbed methane ' s fountain , the coalbed adsorption capacity , the hydrogeologic and physical property of coal beds , and the reservoir forming process
   摘要从煤层气成藏的气源条件、煤层的储集能力、煤层的物性、煤层的水文地质条件和成藏过程等方面，分析了高煤阶煤层气和低煤阶煤层气成藏的差异性。