bids are invited for custom bid for services - attending defective sanders assembly in acdsl locos at ngp btbr gnq round the clock for a period of 03 years ie 1095 days , custom bid for services - supply transportation loading unloading filling of dry screened sand in sand boxes of acdsl locos at ngp btbr and gnq stations and yards around the clock for a period of 03 years ie 1095 days , custom bid for services - filling of dry screened sand attending sanders of ac locos at trip shedajni and cleaning of lookout glass side windows driving cabs both sides and corridor of ac locos round the clock for 03 years ie 1095 days total quantity :