Leeds, Charles Carley, 1870- · New York, D. Van Nostrand company · leaf 44
always employed to indicate a break in a round piece of metal. LESSON.—Make a half-size drawing of the coupling. The sizes of keys may be obtained from the Bill of Material. When laying out the Bill of Material, use great care with lettersand figures, as this information must be accurate and should…
Mechanical drawing
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