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Short Break Line- Heavy irregular line to show short missing section of detail to conserve space on the blueprint.
Long Break Line- Light ruled line with zig-zag pattern to show long missing section of detail to conserve space on the blueprint.
Phantom Line- Thin line composed of long and short dashes to show movement of a part or alternate position.
Hinge
Section Lines- Thin slanting lines that represent a cut surface of an object.
Leader Line- Fine Line with arrow, used to show dimensioning or adding a note.
3 mm hole