Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 190
Fig. 139.I 182 MECHANICAL DRAWING. PLATE XXVIII. Fig. 140. Three views of a bolt having an hexagonal head with aspherical top. The lowest points in the curves of the chamfer, which are really arcs inthis figure, are in the edges and are determined in the front view ; the highestpoints are in the…
Mechanical drawing
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