EN ISO 6789-1:2017 Assembly tools for screws and nuts - Hand torque tools - Part 1: Requirements and methods for design conformance testing and quality conformance testing: minimum requirements for declaration of conformance (ISO 6789-1:2017)

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EN ISO 6789-2:2017 Assembly tools for screws and nuts - Hand torque tools - Part 2: Requirements for calibration and determination of measurement uncertainly (ISO 6789-2:2017)

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