Straight Line Erasing Shield
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An erasing shield of thin metal is convenient in erasing desired shapes.
Galleries
Mechanical Drawing ToolsSource
Kenison, Ervin Mechanical Drawing (Chicago, IL: American School of Correspondence, 1916)
Downloads
2400×1440, 267.4 KiB
1024×614, 24.8 KiB
640×384, 13.2 KiB
320×192, 5.2 KiB