Orthographic projection involves viewing an article being described in a technical drawing from different directions from the front, from a side, from above, from below or from any other viewing ...
If you had a formal drafting class, you probably learned about making orthographic projections–engineering drawings with multiple views (for example, top, front, and right). Even if you didn’t ...
8.3 shows a two-view orthographic projection which includes a sectional end view ... with the ANSI31 hatch pattern which is generally used for the hatching of engineering drawing sections.