Tender For supply of automatic pressure modification (apm) device of air brake wagons having escort designed bmbs system to escorts drg no. 3eb7346 or equival ent. as per the rdso spec. no. wd-23- bmbs-2008 (rev. 1) with amend. - 1 of sept. 2016. suitable to fitment for air brake wagons having bmbs wagons (e scorts design). [ warranty period: 30 months after the date of delivery ]