coal bed

       
  • n. 煤层

coal bed的用法和样例:

例句

用作名词 (n.)
  1. Coal seams intermixed with iron ore.
    煤层和铁矿混杂在一起。
  2. Several coal beds are developed in backswamp deposits.
    河漫沼泽上发育多套煤层。
目录 查词历史