NEMA C78.1431
NEMA C781431 1997-MAY-01 Electrc Lamps - Slde Project Lamps Condensng Dchroc Two-nch 51 MM ntegral Reflector Rm Reference Tungsten-Halogen Lamps wth GY 53 Bases-ConsoldatonRevson of ANS C781405-1991ANS C781422-1991 and ANS C781423-1991 Frst Edton