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 characteristics of high rank coalbed methane reservoir
   中国高煤阶煤层气成藏特征
2. Determination of transmittance for low rank coal
   低煤阶煤的透光率测定方法
3. Forming differences between high and low coal rank coalbed methane reservoirs
   我国高低煤阶煤层气成藏的差异性
4. Experimental study on physical modeling of hydrodynamic condition in low - rank coalbed methane reservoir
   低煤阶煤层气藏水动力条件的物理模拟实验
5. The analysis considered the improvement of the coalbed physical property by heat in structural movements in high coal rank reservoirs and the important role of biogas and free gas in low rank cbm reservoirs
   在分析过程中考虑了构造热事件对高煤阶煤层气藏物性的改造作用和生物气、游离气在低煤阶煤层气成藏过程中的作用。