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medium hard coal meaning in English

中等硬度煤

Examples

  1. The safe coal - miming technology for shotfiring roofcoal caving faces in medium hard coal - beds
    中硬煤层炮采放顶煤的安全开采技术

Related Words

  1. hardest
  2. harder
  3. hard
  4. hard coal
  5. coal
  6. coaling
  7. medium hard
  8. dull hard coal
  9. hard ash coal
  10. hard brown coal
  11. medium harbor tug
  12. medium hard
  13. medium hard steel
  14. medium hardboard
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