Crossword puzzle clue "duplicating aid"

a nonmetallic element

the study of the replacement of parts of the body by electronic components

one that copies

to repeat that which has been said before

a contrivance for multiple copying, by means of a surface of gelatin softened with glycerin

to copy by mimeograph

PHOTOSTAT, (tradename) a photographic apparatus for making facsimiles of documents

to equip, fit out