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Mechanical vibration - Rotor balancing - Part 21: Description and evaluation of balancing machines (ISO 21940-21:2022)

Composite hollow insulators - Pressurized and unpressurized insulators for use in electrical equipment with AC rated voltage greater than 1 000 V AC and D.C. voltage greater than 1500 V - Definitions, test methods, acceptance criteria and design recommendations (IEC 61462:2023); German version EN IEC 61462:2023

Firefighting and rescue service vehicles - Part 2: Common requirements - Safety and performance; German version FprEN 1846-2:2024

Ambient air - Standard method for the measurement of the concentration of nitrogen dioxide and nitrogen monoxide by chemiluminescence; German version FprEN 14211:2024

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