Tenders for Supply of Pantograph Air Supply Isolating Cock 3Eyp400654p001, Drg. No. Pce/Pic/001 Rev. 1 Of M/S Patra & Chanda, Pac In Favour Of M/S Patra & Chanda Mfg I Pvt Ltd Material To Be Procured From Oem Or Its A Uthorised Dealer And May Please Submit Proof Of Purchase Warranty Period: 30 Months After The Date Of Delivery