Secondary vertical damper for Train- 18 coaches to Drg. No. TRAIN18/ MC/ AC- 0- 5- 010 Item- 1, Alt- ' b ' This is conceptual Drawing only. Firm has to submit OEM Drawing with Detailed Dimensions and characteristics and type test report confirming to RDSO/ CG- 18005 Rev- 1 of july 2023 also to be submitted