Babbit, Arthur B · New York, H. Holt and company · leaf 39
28 MECHANICAL DRAWING … Fjg__l3, we have the same proposition as in Fig. 11, with aninterchange of triangles. Do not under any consid-eration place one edge of the right angle of a tri-angle against a line and use the other edge boundingthe right angle to draw a perpendicular to that line.Good, accurate work cannot be…
Mechanical drawing
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