ISO-9960-1 › Draughting instruments with or without graduation -- Part 1: Draughting scale rules
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Specifies the main requirements and the accuracy of draughting scale rules, and their graduations in SI units. Two types of draughting scale rules are covered: those for hand use and those for manually operated draughting machines, both for professional use only. Scale rules for use in schools are not included.
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July 15, 1992
ISO TC 10/SC 9