specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material

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Electrographic processes using a charge pattern (G03G15/00, G03G16/00, G03G17/00 take precedence) > Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20 (G03G13/01 takes precedence) > specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material