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 total qty 7191936 kg f.. , 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 non suburban area for period of two years total qty 8738808 .. , 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 total qty 83040 nos for two years , custom bid for services - checking of sander working and attention of electric and diesel locomotive sand gears in non suburban area for period of two years total qty 95520 nos for two years total quantity :