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 94
Fig. 163 the dimensions tell the size. These are two operations and bothshould be kept in mind. Dimension Lines. — Dimension lines show where the figuresapply to the drawing. They are terminated by arrow heads.The arrow heads should be about twice as long as they are wide.
Mechanical drawing
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