bids are invited for operation and maintenance of e and m installations various capacity of dg sets at jamshedpur providing annual maintenance services of electrical and mechanical installations , annual maintenance contract of following make dg sets 25kva kirloskar , annual maintenance contract of following make dg sets 25kva mahindra , replacement of b checks kit carried out of b check of 25 kva kirloskar make 3 phase ac soundproof generator at dvor , replacement of b checks kit carried out of b check of 25 kva mahindra make 3 phase ac soundproof generator at office dvor , all inclusive comprehensive maintenance of all type makes 1 5 tr capacity split ac , all inclusive comprehensive maintenance of cold ro uv water purifier total quantity : 56