Plugs, socket-outlets and couplers for industrial purposes - Part 4: Switched socket-outlets and connectors with or without interlock (IEC 60309-4:2006, modified + A1:2012) (english version)
Piston-operated volumetric apparatus - Part 1: Terminology, general requirements and user recommendations (ISO 8655-1:2002 + Cor 1:2008) (consolidated version)
Safety requirements for electrical equipment for measurement, control, and laboratory use - General requirements for equipment intended to be used in educational establishments by children (IEC/TS 62850:2013) (english version)
