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Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 14: Equipment for testing the safety of electrical equipment of machinery (IEC 61557-14:2023); German version EN IEC 61557-14:2024

Mechanical vibration - Measurement and evaluation of machine vibration - Part 21: Horizontal axis wind turbines (ISO 20816-21:2025); Text in German and English

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