PRESSURE MEASURING ROTARY SWITCH, AS PER PART NO SR- 075- 1050 OF M/ S SIDWAL & TYPE N4S29D/ GB OF KAYCEE MAKE OR EQUIVALENT TO THIS OF GE & SALZER MAKE ONLY, AS PER SR NO. 36 OF BILL OF MATERIAL, BOM OF RDSO SPECIFICATION NO. RDSO/ PE/ SPEC/ AC/ 0061- 2005, REV- 1, SUITABLE FOR USE IN RMPU TYPE LHB AC COACHES & CONFIRMING TO RDSO SPECIFICATION NO. RDSO/ PE/ SPEC/ AC/ 0061- 2005