Crawshaw, Fred D. (Fred Duane), b. 1874, Phillips, J. D. (James David), 1869- joint author · Chicago, New York, Scott, Foresman and company · leaf 129
Fig. 129. Lines Drawn WITH THE 30°, 60° Tkiangle Fig. 130. Lines DrawnWITH the 45° Triangle … Fig. 131. Lines Drawn with a Combination of the 30°, 60° and 45° Triangle horizontal and at 30° or 60° with the horizontal to the right andto the left. Fig. 129. With the 45° triangle, lines may be drawn PENCIL MECHANICAL DRAWING 125 at 90° to the horizontal and at 45° with the horizontal to the…
Mechanical drawing
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