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    GERMANY

  1. OERTZ-WERKE
  2. OMF

  3. RUSSIA

  4. OLKHOVSKII
  5. OSKBES MAI

  6. SOVIET UNION

  7. OKO
  8. OMOS
  9. OOS
  10. OPO

  11. UNITED STATES

  12. OAKLAND
  13. OCCIDENTAL
  14. OGDEN
  15. OHIO
  16. OHM-STOPPELBEIM
  17. OLDFIELD
  18. OMAC
  19. OMEGA
  20. OMNIONICS
  21. OMNI TITAN
  22. OMNI WELD
  23. ONE GIANT LEAP LLC
  24. O’NEILL
  25. ONG
  26. ON MARK
  27. ORENCO
  28. ORLANDO
  29. OSPREY