bids are invited for custom bid for services - pest control in ac coaches fortnightly at dhn and brka , custom bid for services - pest control in pantry cars weekly at dhn , custom bid for services - pest control in non ac reserved coaches fortnightly in first three months and thereafter monthly at dhn and brka , custom bid for services - pest control in non ac non reserved coaches bi monthly at dhn gmo and brka , custom bid for services - rodent control in ac coaches during every primary maintenance at dhn and brka , custom bid for services - rodent control in pantry cars during every primary maintenance at dhn , custom bid for services - rodent control in non ac reserved coaches weekly at dhn and brka , custom bid for services - fogging of coaches before booking for ioh or poh at every nine months irrespective of ioh or poh at dhn gmo and brka , custom bid for services - rodent control in pit lines of dhn gmo and brka monthly , custom bid for services - rodent control in yards of dhn gmo and brka monthly , custom bid for services - rodent control in dhn loco monthly , custom bid for services - rodent control in weigh bridge of dhn gmo and brka monthly total quantity :