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Mechanical assistant for drawing contour lines
Description of simple and steady tripod support for contour pen with legs soldered at their upper ends to ellipsoidal tube with its minor axis of approximately same diameter as pen handle.
Mechanical assistant for drawing contour lines
Description of simple and steady tripod support for contour pen with legs soldered at their upper ends to ellipsoidal tube with its minor axis of approximately same diameter as pen handle.
Mechanical assistant for drawing contour lines
Civ Eng (NY)
Bayles, C.C. (author)
1937
2 pages
Article (Journal)
English
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