• If the unit has one or more moving parts, the extreme positions of the moving parts are indicated in the Long dashed double-dotted narrow line.
• The long, thin, dashed-dotted line is used to show an object's axis as well as the centers of circles and arcs.
• The long dashes are roughly 10 mm long, and there is a 1 mm gap between each long dash and dot.
• Dimension lines, construction lines, and leader lines are all made up of continuous narrow lines.
Key Points:
• The continuous thick line is utilized to demonstrate the edges or apparent outlines of a component or assembly. If there are too many lines close together and the drawing is crowded, this line might be made thinner to improve the drawing's clarity.
• The most common line type on engineering drawings is the continuous thin line. There is no break in these lines, which are solid.