Tenders for Supply of Aluminium Impeller For Oil Cooling Blower Unit. Centrifugal Design For 3-Phase Locomotive As Per Rdso Spec. No. Rdso/2016 /El/Spec/0123 Rev.O Issued On 05/10/2016 And Drawing No. Rdso/2016/Sk- S/El/Spec/0123. Warranty Period: 30 Months After The Date Of Delivery