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drawing back of pillars meaning in English

后退式回采矿柱

Examples

  1. Drawing back of pillars
    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 axis of crystal
  12. drawing back
  13. drawing bar
  14. drawing base
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