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 134
c D ff IB … Fig. 134 SHEET-METAL PROBLEMS On page 91 references were made to the value ofknowing how to lay out a pattern or template for sheet-metal problems. To the sheet-metal draftsman moreparticularly than any other the use of geometricmethods in drafting is most practical. A great many problems of a…
Mechanical drawing
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