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drawing-back of pillars meaning in Chinese

后退式回采矿柱

Related Words

  1. draw pillars
  2. pillar method
  3. pillar stiffener
  4. coral pillar
  5. pillar operation
  6. bringback pillar
  7. built pillar
  8. hollow pillar
  9. sun pillar
  10. granite pillar
  11. drawing-annealing set
  12. drawing-back
  13. drawing-compass
  14. drawing-down
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