Mechanical Drawing: Outline of Course Engineering 3a, Harvard University; Revised for 1906-07 (Classic Reprint) - Softcover

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Excerpt from Mechanical Drawing<br/><br/>Fig. 12. Along Centre Lines lay 01f 9 inches horizontally and 6 inches vertically, each side of centre. (use Trian gular Scale as shown.) With T-square and Triangle draw rectangle as shown. This is called the Cutting Line.

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