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Tracer of centers circules and circumferences. (Machine-translation by Google Translate, not legally binding)
Tracer of centers circules and circumferences. (Machine-translation by Google Translate, not legally binding)
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机译：中心圆和圆周的示踪剂。 （通过Google翻译进行机器翻译，没有法律约束力）
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摘要
Plotter of circle and circumference centers, characterized in that in a ruler, of variable shape and material, a longitudinal groove or traverse edge is prevented, perpendicular to a reference line symmetrically graduated on both sides from the point of intersection of the groove or tracing edge or its extension with the reference line, so that when equidistant points of said reference line are coincided with the ends of strings of a circle, a center is obtained by means of traces made through the tracer groove or edge . (Machine-translation by Google Translate, not legally binding)
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