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Technical drawings can take many forms: idea or concept sketches (such as the sketches on the previous page), computation sketches, design sketches, layout drawings, part drawings, working or construction drawings, electrical drawings, installation drawings, and assembly drawings are all examples. Sketches, 2D CAD drawings, and 3D CAD models are all forms of technical drawing. Some of these types of technical drawings are shown in Figures 1.1 through 1.3. Each of these types of drawings and others have a place in the process of designing and building a product, system, or structure. In general, technical drawings serve one of three purposes:


Cover of Technical Drawing with Engineering Graphics, Fifteenth Edition


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