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invent your own mechanical drawing shorthand
you dont have to draw a circle with 48 teeth in it to show a 48 tooth gear - just write G48 in the center axis of the gear, and draw one radius to show how big it is
dont try to show every detail in your drawings, only draw center axis lines for shafts
think of the schematic symbols used in electronics - a wire is just a line (no indication of how thick the wire is)- a resistor is a zigzag line
what you are trying to capture is the concept, not the way it looks visually, right?
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