ISO 9960-1:1992 Preview
Draughting instruments with or without graduation -- Part 1: Draughting scale rules
This standard was last reviewed and confirmed in 2015. Therefore this version remains current.
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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