Double Pen
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The Double pen is used to draw parallel lines up to 1/4 inches apart.
Galleries
Mechanical Drawing ToolsSource
French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)
Downloads
323×2400, 144.4 KiB
137×1024, 22.2 KiB
86×640, 12.0 KiB
43×320, 4.7 KiB