This is a sketch called the Three-Quarter Side View & Tip Up. It is one of the most useful views to have in your arsenal when doing a presentation or when you are pitching a design idea. This is because it shows the most surface area better than other "stylized" views; it gives the viewer an overall view of how the surfaces relate to each other.
This view also works well if you want to add "call-outs" or if you want to turn it into an Exploded View to show parts that are not normally visible.
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