Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 92
V77777777, … Vy///////A Fig. /a 2 dotted lines may be omitted from both halves, as was done inFig. 175. Sections of Ribs and Symmetrical Parts. — Ribs, arms, andgear teeth are not ordinarily sectioned even though they appear 76 ESSENTIALS OF DRAFTING on the plane of the section. Figs. 177 and 178 illustrate…
Mechanical drawing
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