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Object Line

Hidden Line - Represents edges not visible from the current viewpoint, often shown as dashed lines.

Center Line
Indicates the center of circles or arcs, typically displayed as alternating long and short dashes.

Dimension Line
A line that indicates the extent and location of a dimension, often accompanied by an arrowhead at each end.

Extension Line

Phantom Line

Short Break

Cutting Plane Line

Viewing Plane Line

Section

Chain