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PARALLEL RULL, PLASTIC PLAIN 18" Impa 371001 View full size

PARALLEL RULL, PLASTIC PLAIN 18" Impa 371001

These navigator's parallel rulers are inscribed with full 180° protractor markings. The middle of the bottom edgeforms the protractor center when the arms are closed.

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These navigator's parallel rulers are inscribed with full 180° protractor markings. The middle of the bottom edgeforms the protractor center when the arms are closed. This tool combines the essential features of a protractor plotter and a basic parallel ruler. Allows courses to be measured from a convenient meridian. Made or extra strong, crystal clear acrylic.


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