Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 255
FiG. 282. V-Thread, Showing Helices tionalized into straight lines as shown in Fig. 283. The methodcommonly used for representing screws up to about one inch indiameter, as measured on the drawing, is still further simplifiedby omitting the short inclined lines forming the saw teeth. ADVANCED…
Mechanical drawing
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