coal-rock
常见例句
- Coal rock can be classified as humic and sapropelic coal.
在煤岩的分类中，有腐殖煤和腐泥煤之分。 - Research shows that maceral and the degree of metamorphism of coal rock are key factors that control the generating and storing capacity of coal rock.
煤岩组分和煤变质程度是影响煤层生储气能力的主控因素。 返回 coal-rock