?高煤阶煤
... medium rank coal 中煤阶煤 high rank coal 高煤阶煤 coal grade 煤的品位:煤中含有杂质的程度。 ...
?高煤级煤
high rank coal高煤级煤 This has provided an important clue for setting up a new development base of high rank coal seams in China.
?高级煤
... 高级码 advanced code 高级煤 high grade coal; high rank coal; high-quality coal; high-rank coal; premium coal 高级醚 higher ether ...
?优质煤
... 优质毛 quality wool 优质煤 high rank coal; rich coal 优质棉 quality cotton ...
矿物 高级煤 ; 优质煤
高煤级煤储层
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