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untimbered rill stoping meaning in English

无支护倾斜分层充填法回采

Related Words

  1. untimbered
  2. untimbered rill
  3. untimbered tunnel
  4. untimbered rill method
  5. rill
  6. foot rill
  7. rill cutting
  8. rill cast
  9. rill stage
  10. rill channel
  11. untimbered rill
  12. untimbered rill method
  13. untimbered tunnel
  14. untime
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