extraction coal的意思|示意

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extraction coal相关短语

1、 strip extraction coal-pillar mining 条采煤柱回收

2、 coal extraction 采煤,回采

3、 extraction coal reserves 回采煤量

4、 dry ash extraction coal boiler 固态排渣炉

5、 Coal Extraction with Solvents 煤的溶剂萃取

6、 the extraction of coal gas 瓦斯抽采

7、 Close Range Coal Seam Extraction 近距煤层回采

8、 extraction of coal 煤的抽提

9、 extraction mining coal 回采阶段

10、 solvent extraction of coal 煤的溶剂抽提