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longwall retreating meaning in English

后退式长壁开采

Related Words

  1. longwall
  2. retreating longwall
  3. longwall advancing
  4. longwall working
  5. longwall face
  6. full longwall
  7. outward longwall
  8. longwall coalcutter
  9. underhand longwall
  10. advancing longwall
  11. longwall mining
  12. longwall peak stoping v
  13. longwall undercutter
  14. longwall with caving
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