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Machinery pattern making (1894)
Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 200
FULL SIZE GEAR TEETH.from Prof. S. W. RobinsoJi s Tetnplet Odontograph. 14 31 r. IS 21 P. / ■G4 \ -7-G2 / IG to 17 s. r. … 18 to 19 2. r.Patternmaking
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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