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 56
MECHANICAL DRAWING 53 zontal motion of a point about a right line as an axis,no two points of the curve lying in the same plane.The upper part of Fig. 50 shows this part laid out apartfrom its application to the screw thread. Construction :Lay out the plan and elevation of the thread desired. … Fig.51 54 A PRACTICAL COURSE IN
Mechanical drawing
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