Ruling Pen
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The ruling pen with spring blade for easy cleaning. Ruling pens are useful in drawing with ink.
Galleries
Mechanical Drawing ToolsSource
French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)
Downloads
2400×319, 81.9 KiB
1024×136, 13.4 KiB
640×85, 7.3 KiB
320×42, 3.1 KiB