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room-and-pillar caving meaning in English

房柱式崩落开采法

Related Words

  1. pillar method
  2. pillar stiffener
  3. coral pillar
  4. pillar operation
  5. bringback pillar
  6. built pillar
  7. hollow pillar
  8. sun pillar
  9. granite pillar
  10. draw pillars
  11. room with good ventilation
  12. room with shower
  13. room-and-pillar mining
  14. room-and-pillar structure
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