CUT OFF ANGLE COCK WITH VENT FOR COACHING STOCK WITH REDUCING BUSH AND CONFORMING TO RDSO SPEC. NO: 02- ABR- 02, Amendment No. 4 of September 2016, APPENDIX- D, DRG NO: WD- 88123- S- 01 AND EMU/ M- 3- 5- 053, ITEM- 7, ALT: 2 AND n/ 17, TYPE DRG: RDSO.