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A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)

Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 152

An illustration from A practical course in mechanical drawing for individual study and shop classes, trade and high schools, 1912, leaf 152 — Fig:. 152 of a cone and hexagonal prism, or the chamfered por-tion of a hexagonal nut. MECHANICAL DRAWING 149

Mechanical drawing

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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