000 00231nam a2200073 4500
080 _a
_b
245 _aIS: 9166 - 1979; Specification for Spark Test Appartus for Intrinsically-Safe Circuits
700 _aINDIAN STANDARDS INSTITUTION
260 _aNew Delhi
_bBIS
_c1979
300 _a13p
999 _c28014
_d28014