Air filters for general ventilation - Part 1: Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM) (ISO 16890-1:2016)
Low-voltage switchgear and controlgear assemblies - Protection against electric shock - Protection against unintentional direct contact with hazardous live parts.
Especificaciones para tipos particulares de hilos para bobinas electromagnéticas. Parte 7: Hilo de cobre de sección circular esmaltado con poliimida, clase 220.