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opening up by tunnels meaning in Chinese

平硐开拓

Related Words

  1. tunnel correction
  2. undersea tunnel
  3. grade tunnel
  4. tunnel form
  5. medium tunnel
  6. tunneling effect
  7. underground tunnel
  8. avalanche tunnel
  9. sewer tunnel
  10. freezing tunnel
  11. opening up by adits
  12. opening up by inclined shafts
  13. opening up by vertical shafts
  14. opening up individually
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