000
00227nam a2200073 4500
080
_a
_b
245
_a
IS: 6616 - 1972; Specification for Ballasts for High Pressure Mercury Vapour Lamps
700
_a
INDIAN STANDARDS INSTITUTION
260
_a
New Delhi
_b
BIS
_c
1972
300
_a
29p
999
_c
30113
_d
30113