supply of liner 100 x 80 x 3 mm thick . , liner 100 x 80 x 3 mm thick . drawing no :- wd-93023-s/1, alt. nil, item no. 2 . spec. n o:- wd-21-casnub-22 nlb bogie- 93, rev. 2 with amend. 6. inspection :- i) further all the necessary i nspections shall be carried out as per para-9 and clauses contained therein as per rdso spec. no. w d-21-casnub-22 nlb bogie- 93, rev. 2 with amend. 6 ) special terms & conditions :-1.. liner shall be marked for manufacturer initial and month and the year of manufactured by metal laser engraving in 6mm size and 0.1 mm depth minimum. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]