Korea lignite

• 朝鲜褐煤

Korea lignite的用法和样例：

例句

1. Lignite oil is creosote derived from lignite tar.
   褐煤油是从褐煤中得来的防腐油。
2. Lignite and peat show acid when mixing with water.
   褐煤和泥炭遇水后呈现酸性。