STANDARD Drafting Practices Machinery's Handbook, 31st Edition
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Table 2. American National Standard Lines for Engineering Drawings ANSI/ASME Y14.2-2014 Visible Line THICK
THIN
Hidden Line
THIN
Section Line
THIN
Center Line
THIN
Symmetry Line
Leader
Extension Line
Dimension Line 3.50
Dimension Line Extension Line and Leader
THIN
THICK
Cutting-Plane Line or Viewing-Plane Line
THICK
THICK THIN
Short Breaks
Break Line
Long Breaks
THIN
Phantom Line
THIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . THIN
Stitch Line
THICK
Chain Line
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