Space Pen || current affairs || Zero Gravity Pen || NASA – জানা অজানা -wifistudy

This pen, known as the Zero Gravity Pen, uses a pressurized ink cartridge. It is possible to write underwater, in space, on wet and oiled paper, in any corner, above and below as you like. This pen was invented by Paul C. Fisher 7 of America
Fisher offers this pen to NASA According to media reports, NASA bought 400$ of these pens for 6$ per unit for the Apollo project. In 1989, the Soviet Union bought 100 of these pens for the Soyuz mission.....................

source: online
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Space Pen || current affairs || Zero Gravity Pen || NASA - জানা অজানা


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