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Qualification testing of welders - Fusion welding

Gas infrastructure - Injection station - Part 3: Specific requirements regarding the injection of hydrogen fuel gas; German version FprEN 17928-3:2024

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EN 17928-3

Gas infrastructure - Injection stations - Part 3: Specific requirements regarding the injection of hydrogen

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

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