Center Screw Bow

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A center screw bow to draw circles. The adjustable screw is in the middle of the bow.


French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)


TIFF (full resolution)

771×2400, 248.2 KiB

Large GIF

328×1024, 34.6 KiB

Medium GIF

205×640, 18.9 KiB

Small GIF

102×320, 7.3 KiB