00262nam a2200121Ia 4500100001800000650002700018654001400045245002400059260002800083082001000111300000700121546001200128  aJain /Gyan C   aElectrical Engineering  aServicing  aServicing Contec 20  bB.P.B Pub.aDelhic1985  a621.3  a35  aENGLISH