bids are invited for custom bid for services - supply transportation loading unloading storing and filling of dry screened sand in sand boxes of electric and diesel locomotives of the crew changing locations in suburban area for period of two years qty 8108456 kg , custom bid for services - supply, transportation, loading, unloading, storing and filling of dry screened sand in sand boxes of electric and diesel locomotives of the crew changing locations in nonsuburban area for period of two years qty 9402659 kg , custom bid for services - checking of sander working and attention of electric and diesel locomotive sand gears in suburban area for period of two years qty 96457 nos , custom bid for services - checking of sander working and attention of electric and diesel locomotive sand gears in nonsuburban area for period of two years qty 92280 nos