The technic of mechanical drafting a practical guide to neat, correct, and legible drawing (1904)
Reinhardt, Chas. William (Charles William), b. 1858 · New York, The Engineering News Pub. Co. · leaf 26
he writer believes, while fully realizing the consequences o£being considered a confirmed heretic, a > d that truly parallel lines are not es-sential in section-lining as long as aneven tone of the hatched surface is ob-tained by the means outlined above.With small or narrow areas of sec-tions…
Mechanical drawing
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