Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 3: Gauges (IEC 60061-3:1969 + supplements A:1970 to U:1997 + A20:1998 to A43:2011 + A44:2011, modified); German version EN 60061-3:1993 + A1:1995 to A7:1997 + A20:1998 to A43:2011 + A44:2011— 829 стр.
High-pressure sodium vapour lamps (IEC 60662:1980 and amendment 1:1986, amendment 2:1987 and amendment 3:1990, modified); German version EN 60662:1993— 49 стр.
High-pressure sodium vapour lamps (IEC 60662:1980 and amendment 1:1986, amendment 2:1987 and amendment 3:1990, modified); German version EN 60662:1993— 49 стр.