... independent molten roller water supply system, cross feed, side-lay positioning,automatic double-feed detection,automatic inking.3)Auto double detect ... for odd,short run or batch printing jobs of single-color printing.Main technical paramenters: ZF47ACZF47BCZF56ACZF56BCZF62BCMax sheet size470*365mm470*365mm560*400mm560*400mm620* ... ,62AC: 47,56,62BC:. ZF47,56,62AC Economical fast offset printing machine