Line Conventions, ContinuedPhantom ordatum linesTo indicate alternate positions of parts, repeated detail, or to indicate a datumplane, use phantom or datum lines. Phantom or datum lines consist of amedium weight series of one long dash and two short dashes evenly spacedand terminating in a long dash.Figure 3-19 is an example of a phantom line.Figure 3-19.—Showingalternate lever positions withphantom lines.Stitch linesDepict stitching or sewing on an object with medium-weight, short dashesevenly spaced and labeled as stitching or sewing. These lines are calledstitch lines.Figure 3-20 is an example of stitch lines.Figure 3-20.—Stitch lines showingthe reenforcement of a d-ring on astrap.Continued on next page3-22
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