Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 261
the curves are drawn and also theconventional representation which shows the curves replaced bystraight lines. Bolts and Nvts. A bolt consists of a rod with a head on oneend and a screw on the other to receive a nut. Fig. 291. Whatare known as United States Standard bolts and nuts are shown 256… … FiG. 290. Coil Spring Showing Actual and ConventionalEepeesentation
Mechanical drawing
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