supply of spring setting device (ssd)spring setting device (ssd),spring setting device (ssd) to rdso drg. no. t-6216 (alt-5) dated 04.10.2019 for use w ith zu-1-60 thick web curved switch b.g. ( 1673mm ) for 60 kg. ( uic ) psc sleepers as per specification irs: for ssd for use with or curved switches (provisional-2008) with latest amendment.,a s per attached drawing. [ warranty period: 30 months after the date of delivery ] ] , spring setting device for tws 60 kg 1 in 12 to rdso drg no. t-6216 alt - 5 or latest fo r use with zu1-60 thick web curved switch (bg) on 60 kg psc sleepers [ warranty period: 30 mont hs after the date of delivery ] ] , manufacture and fabrication of complete assembly of spring setting device (ssd) to r dso drawing no.t-6216 for use with zu-1-60 thick web switches bg (1673mm) for 60 kg uic on psc sleepers with latest alt. [ warranty period: 30 months after the date of delivery ] ]