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Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and…

Overview ISO 9177-1:2016 - "Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and testing" defines how hand‑held mechanical pencils intended for…

Mechanical pencils — Part 1: Classification, dimensions, performance requirements and testing

Mechanical pencils for technical drawings — Part 1: Classification, dimensions, performance requirements and…

Overview ISO 9177-1:2016 - "Mechanical pencils for technical drawings - Part 1: Classification, dimensions, performance requirements and testing" defines how hand‑held mechanical pencils intended for…