Tender For supply of electronicthermostat heat/cool, model ae-eth of m/s. a paul make suitable for m/s. amit engi neer's roof mounted packaged ac system in electric locomotives as per rdso spec. no. rdso/pe/spec/ac/ 0020, rev-0 sept. 2000 with amendment no. 4. [ warranty period: 30 months after the date of delivery ]