equipment designed to serve a specific function

make a duplicate or duplicates of

duplicator that transmits the copy by wire or radio

duplicator consisting of a gelatin plate from which ink can be taken to make a copy

duplicator that prints by lithography; a flat surface (of stone or metal) is treated to absorb or repel ink in the desired pattern

a rotary duplicator that uses a stencil through which ink is pressed (trade mark Roneo)

a copier that uses photographic methods of making copies