Thomas, Hugh Kerr · New York, McGraw-Hill Book Company, Inc.; [etc., etc.] · leaf 7
Frontspiece. A Fifteenth Century Worm Gear from an Etching by Albrecht Diirer, WORM GEAHING BYHUGH KERR THOMAS M. 1. MECH. E.y M. A. B. M. E., M. Z. A. E. Second EditionRevised and Enlarged McGRAW-HILL BOOK COMPANY, Inc.239 WEST 39TH STREET. NEW YORK LONDON: HILL PUBLISHING CO., Ltd. d & 8…
Gearing, Worm
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