00337nam a2200133Ia 4500008004100000041000800041082001600049100003000065245001900095250000800114260004700122300000700169650002700176230711s9999||||xx |||||||||||||| ||und||  aENG  a621.3bBU-I  aBureau of Indian Standard 0aIS : 2933 1975  a1st  c1975aNew DelhibBureau of Indian Standard  a16  aElectrical Engineering