Spring Dividers
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Spring dividers used to compare lengths or transfer measurements from one location to another, as when used on a map and then compared to the map scale.
Galleries
Measurement ToolsSource
Smith, Robert H. Book of Advanced Machine Work (Boston, MS: Industrial Education Book Company, 1919) 1316
Downloads
1502×3120, 411.8 KiB
492×1024, 51.1 KiB
308×640, 26.1 KiB
154×320, 10.5 KiB