bids are invited for operation and maintenance of water supply systems - outsourcing of services for maintenace operation of water supply installations at rowriah pump house no 01 , operation and maintenance of water supply systems - outsourcing of services for maintenace operation of water supply installations at 21 para and boiler pump house no 02 , operation and maintenance of water supply systems - pump house no 03 at saraibari , operation and maintenance of water supply systems - pump house no 035at bhalukmara , operation and maintenance of water supply systems - pump house no 07 at lichubari , operation and maintenance of water supply systems - pump house no 08 at lichubari , operation and maintenance of water supply systems - pump house no 09 at lichubari , operation and maintenance of water supply systems - pump house no 10 at bhalukmara , operation and maintenance of water supply systems - pump house no 01 at rowriah , operation and maintenance of water supply systems - pump house no 11 at bhaukmara , operation and maintenance of water supply systems - pump house no 10 at bhaukmara , operation and maintenance of water supply systems - pump house no 01 at rowriah , operation and maintenance of water supply systems - mechanical laundry at 21 para , operation and maintenance of water supply systems - water diving pool at rowariah , operation and maintenance of water supply systems - water supply at ph 01 total quantity :