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László Bíró
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Biro ballpoint pen
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ball bearing. Disassembled ball bearing. rotational friction Automobile Industry, Engineering, Industry, Machine Part, Metal Industry, Sphere, Steel, Wheel
Inventors and Inventions

László Bíró: Media

Hungarian inventor
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Biro ballpoint pen
An original Biro ballpoint pen, Argentina.
Roberto Fiadone and Daniel Schwen
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