First learn about the how to draw 1st and 3rd projection of a assemble parts when the tutor explain about it with computer chair. Then picture of a computer chair separated into plan (top) view, front view and 2 side views. Example:
I Drew 3rd project engineering drawing by looking at the prototype block. the drawings include the plan view, side views by the third angle projection on A3 paper using ruler and pencil and eraser.
the scale we use for the drawings of the block is 1:1. Example:
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