Hinged Ruling Pen
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A hinged ruling for pen 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
674×2400, 174.1 KiB
287×1024, 26.5 KiB
179×640, 14.6 KiB
89×320, 6.0 KiB