Supply Of Thermoplastic Polyurethane Spring Pads Happy Pads For Secondary Springs Of 3 Phase Locos As Per Ref. No.1 Of S.c. Rly. Drg. No.c/els/lgd/bogie/3/140, Alt-2. Testing And Material As Per Rdso Specification No. Mp.0.40.99.01rev-03 August, 2017.