Occupational safety standards system. Respiratory protective devices. Self contained escape apparatus with chemical oxygen. General technical requirements. Test methods
Packets quick-changing with horizontal break of press-moulds for manufacturing of rubber O-rings section with inner diameter from 2,8 up to 9,7 mm. Construction and dimensions
Explosion-protected electrical apparatus. Part 12. Classification of mixtures of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting currents
