Center Screw Bow
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A center screw bow to draw circles. The adjustable screw is in the middle of the bow.
Galleries
Mechanical Drawing ToolsSource
French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)
Downloads
771×2400, 248.2 KiB
328×1024, 34.6 KiB
205×640, 18.9 KiB
102×320, 7.3 KiB