Projection is the means used to show the drawn object from different directions. In some cases a single view would be sufficient. It may look the same from all directions - a ball or a cube - or we may be able to deduce the other view. In Fig. 11 for example, the end view is clearly two concentric circles and it would be a waste of space to draw it. For the majority of objects, however, this is not possible, and we must look
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