This line may be made thin if the drawing isĬongested and allot of lines are so close to each other that the clarity The continuous thick line is used to show visible outlines or edges of aĬomponent or assembly. Often, most drafting companies will have their own custom layers with different colours, however the final product on paper will (or should) be as discussed below.
Depending on the layer chosen, the line will display it in a certain way. Most CAD Software packages will have these different line types predefined as layers. Hidden detail are shown with a certain line type to avoid confusion with visible edges. For example, holes require center lines to identify the center and show that it is round. Certain features on a Engineering Drawing requires specific ways of indication.
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