Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 102
termed sectioning and consists of various combina-tions of spacing, and light and heavy weight Hnes drawn paralleland covering the area which represents the surface assumed tobe cut and exposed to view. No uniformity exists in practiceas to the combination of lines and spaces that shall represent… … VmouCHT IRON Vj
Mechanical drawing
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