Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 1: Lamp caps (IEC 60061-1:1969 + supplements A:1970 to V:1997 + A21:1998 to A53:2015, modified) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 1: Lamps Caps (IEC 60061-1:1969 + Ergänzungen A:1970 to V:1997 + A21:1998 bis A58:2018, modified) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps (IEC 60061-1:1969 + supplements A:1970 to V:1997 + A21:1998 to A46:2011, modified) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps (IEC 60061-1:1969 + supplements A:1970 to V:1997 + A21:1998 to A46:2011, modified) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 1: Lamps Caps (IEC 60061-1:1969 + Ergänzungen A:1970 to V:1997 + A21:1998 bis A58:2018, modified) (english version)
