supply of digital ultrasonic double rail tester , digital ultrasonic double rail tester with 9 probes on each rail and minimum two ba se lines colored signals and real a-scan pulse echo with continuous recording of b-scan storage of each pr obe along with data setups as per rdso specification no. rdso/m&c/ndt/130/2007 (b scan) rev-iv, augu st 2021. version 5.0 (or latest if any) with std. accessories. latest rdso specification attached e - office file page no 14 to 30. (item reserved for rdso approved source with item id: 3100580, sub item id: 31005800 01) [ warranty period: 36 months after the date of delivery ] ]