Who invented the ball point pen?

সাধারণ বিজ্ঞান Basic Information of Daily Science, Inventions and... 07 Oct, 2020

প্রশ্ন Who invented the ball point pen?

  • ক.
    Wilson
  • খ.
    Lazio Biro
  • গ.
    Waterman
  • ঘ.
    Oscar

সঠিক উত্তর

Waterman

মন্তব্য

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