Why HCl not harm your stomach?

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  1. #because
  2. #mucous
  3. #digest
  4. #stomach
  5. #around
  6. #itself
  7. #would
  8. #digested
  9. #present
  10. #prevents
  11. #epithelial
  12. #cells
  13. #layer
  14. #simply
  15. #protein
  16. #there
  17. #strong