tender for silent block for centre pivot arrgt. (traction centre elastic joint) for fiat bogie to drg. no. c53973 ref bred 8397 rev.02 (firms no. 98.2.00119b/pirelli) to be read with specn. no. ts.17.533.100.00amdt. no.1, ts.17.617.100.02, mdts-148 rev.01 and mdts-122 rev.03.