supply of sni of retention tank , retention tank with s-trap arrangement to drg. no. dmu/tc/ss-6-3-012, col-1 , alt- e, and as per specn. icf/md/spec-254, issue status-01, rev-02 with amd. 01 (except ma terial deviation list). [ warranty period: 36 months after the date of delivery ] ] , retention tank with s-trap & without pressurised flushing for lwlrrm coa ches to drg.no.mi006418, alt-c, anx-1 and as per specn. mdts-26001, rev-04(except clause 3.5 -pressurised flushing system) for special terms and condition for procurement of r etention tank system for lhb coaches. [ warranty period: 84 months after the date of deliver y ] ]