supply of double rotary lock liftdouble rotary lock lift,double rotary lock lift as per dellner part no. 1030604 for aar h type cbc (dellner make) with balance draft gear to rdso spec. no. rdso/2011/cg-03 rev. 01 [ warranty period: 30 months after the date of delivery ] ] , manual uncoupling device as per dellner part no. 1056932 for aar h type cbc [ warranty period: 30 months after the date of delivery ] ] , knuckle thrower as per dellner part no. 1030475 for aar h type cbc (dellner make) with b alance draft gear to rdso spec. no. rdso/2011/cg-03 rev. 01. [ warranty period: 30 months after the d ate of delivery ] ] , 1)mechanical coupler-1 no , 2)socket joint-4 nos, 3)lock-4 nos [ warranty period: 30 mont hs after the date of delivery ] ]