Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 34
UMENTS AND MATERIALS 13 A triangle should not be used alone in drawing lines parallel orat a given angle with one another, but should be guided by theworking edge of the T-square oranother triangle. Fig. 8 showsthe method of drawing parallellines, using one triangle as aguide for the other. In a…
Mechanical drawing
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