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  • Working principle of ball pen

    samarjeetsaigal

    Member

    Updated: Oct 25, 2024
    Views: 1.1K
    Can anyone explain me the working principle of ball point pen???
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  • stray fire engg.

    Member • Aug 7, 2010

    atmospheric pressur yaar
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  • Kaustubh Katdare

    Administrator • Aug 7, 2010

    stray fire engg.
    atmospheric pressur yaar
    Maybe you should restrict language to English. This is an international forum.
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