supply of manufacture and supply of wider prestressed concrete sleepers for sharp curves ( of radius less than 350 m ) conforming to rdso drg. no. t-8979 , alt-1 for 25 t axle load for 60kg ( uic ) / 60e1 rails. specification: irs specification for pretensioned prestressed concrete sleepers for turnouts t-39-2021 ( 6th revision march-2021 ) . [ warranty period: 60 months after the date of delivery ] dy.ce.c.wat, ecor andhra pradesh 1388.00 numbers pwi-araku, ecor andhra pradesh 1467.00 numbers , manufacture and supply of wider prestressed concrete sleepers for sharp curves ( of radius less than 350 m ) conforming to rdso drg. no. t-8980 , alt-1 for 25 t axle load for 60kg ( uic ) / 60e1 rails. specification: irs specification for pretensioned prestressed concrete sleepers for turnouts t-39-2021 ( 6th revision march-2021 ) . [ warranty period: 60 months after the date of delivery ] dy.ce.c.wat, ecor andhra pradesh 1388.00 numbers pwi-araku, ecor andhra pradesh 1467.00 numbers , manufacture and supply of wider prestressed concrete sleepers for sharp curves ( of radius less than 350 m ) conforming to rdso drg. no. t-8981 , alt-1 for 25 t axle load for 60kg ( uic ) / 60e1 rails. specification: irs specification for pretensioned prestressed concrete sleepers for turnouts t-39-2021 ( 6th revision march-2021 ) . [ warranty period: 60 months after the date of delivery ] dy.ce.c.wat, ecor andhra pradesh 1388.00 numbers pwi-araku, ecor andhra pradesh 1467.00 numbers , manufacture and supply of wider prestressed concrete sleepers for sharp curves ( of radius less than 350 m ) conforming to rdso drg. no. t-8982 , alt-1 for 25 t axle load for 60kg ( uic ) / 60e1 rails. specification: irs specification for pretensioned prestressed concrete sleepers for turnouts t-39-2021 ( 6th revision march-2021 ) . [ warranty period: 60 months after the date of delivery ] dy.ce.c.wat, ecor andhra pradesh 6637.00 numbers