Transportable gas cylinders. Compatibility of cylinder and valve materials with gas contents. Part 4. Test methods for selecting steels resistant to hydrogen embrittlement
Fixed capacitors for use in electronic equipment. Part 14. Sectional specification. Fixed capacitors for electromagnetic interference suppression and connection to the supply mains
Explosionproof electrical apparatus. Part 12. Classification of mixtures of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting currents
