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unsupported back span meaning in English

无支护顶板跨度

Related Words

  1. unsupported
  2. unsupported span
  3. unsupported roof
  4. unsupported hole
  5. unsupported operation
  6. unsupported barrel
  7. unsupported distance
  8. unsupported width
  9. unsupported covering
  10. unsupported depth
  11. unsupported area
  12. unsupported back
  13. unsupported barrel
  14. unsupported casing
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