supply of sealing ring or u section ring bt item no. a 2303 as per drg. no. swt-435461-p1 or aal item no. m2303 as per drg. no. 9910383748001 or skel-3463 rdso spec/e4/01 item to be procured from approved sources as per rdso tc 0102 rev-o dated 12.05.2010. each unitshould be emboss/engraved with makers name year and batch no. of manufacturiong at a conpicuous place. , sealing ring or u section ring bt item no. a 2303 as per drg. no. swt-435461-p1 or aal item no. m2303 as per drg. no. 9910383748001 or skel-3463 rdso spec/e-4/01 item to b e procured from approved sources as per rdso tc 0102 rev-o dated 12.05.2010. each unit s hould be emboss/engraved with makers name year and batch no. of manufacturiong at a conpicuous place. [ warranty period: 30 months after the date of delivery ] ]