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  • Voltaire
    Voltaire

    @voltaire-4MxWke • Aug 5, 2010

    I know they use carbon in some of them

    0
  • irfan pathan
    irfan pathan

    @irfan-pathan-KEwm7F • Aug 6, 2010

    in my opinion they melt some phosphide materails to produce resistors

    0