... are involved in: 1)Dot matrix printer parts, like printer head, pin, head cable, guide, main board, power board, carriage, RDA, ... , Htr lamp ,Paper Pickup Roller ,ARM, Fuser Fixing film, Manual feed roller,Drum drive gear,motor gear ,cable,transport belt ,thermoswitch ... : main part, powder board , pump, cartridge contact board , head cable ,CISS ... 5)Plotter parts:belt.encode trip.carriage assembly ...