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Mechanical drawing problems for high schools, normal schools and vocational schools (1918)
Berg, Edward. [from old catalog], Kronquist, Emil F. (Emil Fritjoff), b. 1882 · Peoria, Ill. : The Manual arts press · leaf 202
Conventional Relpre-&elntat(On Actual Form <5HO\A/INe HELICE.& 200 Square thread and acme thread Pitc h —^ [-»- Pitch -M mmmmm. /PROFILE OF /^CME- THFJELAQ/PFtOFIUE. Of^ 3,QUAFt£. THREADSA ^ ^ y//////////////////////////////////////AMechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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