supply of bellow duct with meta / para aramide fabric bellow duct for lhb ac coaches, , supply of bellow duct with meta / para aramide fabric bellow duct for lhb ac coaches, ( eog type ac coaches ) conforming to rdso specification no.rdso / pe / spec / ac-0197-2020 ( rev-0 ) scope of supply per rmpu consisting of 1 no. of supply air bellow, 2 no. of fresh air bellow and 2 no. of return air bellow duct with metallic frames as per rdso drg no.rdso / pe / sk / ac / 0069-2004 ( rev-3 ) . material to be procured from rdso approved suppliers sidwal refrigeration, concord control, om namah shivaya, perfect techno consultants.firm must have to submit the test report, approval copy of rdso and warranty certifiicate for 60 months as per as per rdso specification no. rdso / pe / spec / ac-0197-2020 ( rev-0 ) . [ warranty period: 30 months after the date of delivery ]