bids are invited for thyristor / igbt controlled d.c. motor drive with tachogenerator feedback arrangement , thyristor / igbt controlled a.c. motor drive with , ss and sc centre lathe ( all geared ) with minimum , compressor unit , pneumatic trainer kitwith accessories as mentioned in attached specifications . , hydraulic trainer kitwith accessories as mentioned in attached specifications . , cut-section models for hydraulic components , d.c. shunt generator with control panel , motor generator ( dc to ac ) set consisting of items as mentioned in attached specifications. , motor-generator ( ac to dc ) , d.c. compound generator with control panel as per attachment , d.c. compound motor with starter and switch , synchronous motor with accessories like starter, excitation arrangements , electrical machine trainer , ceiling fan coil winding machine , primary current injection set , stepper motor with digital controller , shaded pole motor , working bench , used dc generators-series, shunt and compound type for overhauling practice with copper winding , oscilloscope dual trace , liner i.c. trainer , digital i.c. trainer , oil testing kit