supply of rate contract for composite grooved rubber sole plates 10 mm thick for wider psc sleepers to use with 60kg (uic) & 52kg rails to rdso drg no t-8747, with latest alteration if any.rate contract for composite grooved rubber sole plates 10 mm thick for wider psc sleepers to use with 60kg (uic) & 52kg rails to rdso drg no t-8747, with latest alteration if any.,composite grooved rubber sole plates 10 mm thick for wider psc sleepers to use with 60kg (ui c) & 52kg rails to rdso drg no t-8747, with latest alteration if any, specification: irs t 55-2023 with latest alter ations. the term latest alterations wherever used will mean the alteration up to the actual date of opening of tend er. [ warranty period: 30 months after the date of delivery ]