000 00247nam a2200073 4500
080 _a
_b
245 _aIS:1818 - 1972 : Specification for alternating current isolators (disconnectors) and earthing switches
700 _aINDIAN STANDARDS INSTITUTION
260 _aNew Delhi
_bBIS
_c1972
300 _a29p
999 _c25506
_d25506