趣英语 / 查找：“coal seam” [共找到3条结果]

  • coal seam的音标？

    coal seam的音标：coal seam的英式发音音标为：[kəul si:m]coal seam的美式发音音标为：[kol sim]...

  • coal seam什么意思？

    n.煤层...

  • coal seam造句

    The average UK coal seam is one metre thick.英国煤层的平均厚度为1米。Coal Mine, its coal seam is easily spontaneous fire.大雁二矿煤种为褐煤, 属易自燃发火煤层.Factors affected coal seam permeability change and its law is analyzed.分析了煤层透气性变化的影响因素及变化规律...