bids are invited for custom bid for services - boq item no 1 semi skilled refrigeration mechanic per shift of 08 hours 2574 shifts , custom bid for services - boq item no 2 supply only hermetically sealed scroll compressors suitable for package type air conditioner of 55ton capacity with mounting assembly such as rubber springs 11 each , custom bid for services - boq item no 3 supply refrigerant gas r22 complete all as directed make floron 365 kg , custom bid for services - boq item no 4 supply refrigerant gas r32 complete all as directed make floron 360 each , custom bid for services - boq item no 5 supply refrigerant gas r134 complete all as directed make floron 186 each - operation and maintenance of electrical systems/electrical installations operation and maintenance of electrical systems/electrical installations operation and maintenance of electrical systems/electrical installations operation and maintenance of electrical systems/electrical installations operation and maintenance of electrical systems/electrical installations total quantity :