IEC 60061-2:1969/AMD21:2000 Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 2: Lampholders; Amendment 21 was changed to IEC 60061-DB:2005 Lamp caps and holders together with gauges for the control of interchangeability and safety - 12-month subscription to online database comprising all parts of IEC 60061.
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