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The outer edge of this bronze wheel is covered with a brass ring, cut with 2,160 gear teeth. The teeth engage a screw on one side of the machine, which, when turned, rotates the carriage and guides the cutting of measurements into a circle's rim.
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The outer edge of this bronze wheel is covered with a brass ring, cut with 2,160 gear teeth. The teeth engage a screw on one side of the machine, which, when turned, rotates the carriage and guides the cutting of measurements into a circle's rim.


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