bids are invited for services - handling of empty cylinder , custom bid for services - purging of cylinders , custom bid for services - handling of filled cylinder , custom bid for services - hndlg of sqc cylinder nd tag , custom bid for services - manpower at stationary flg sc , custom bid for services - uncapping of cylinder , custom bid for services - carousal attendant , custom bid for services - tying of new salvaged cap , custom bid for services - replacement of o ring , custom bid for services - capping of cylinder , custom bid for services - placing of seal on cylinder , custom bid for services - reliever , custom bid for services - evacuation of cylinder , custom bid for services - on line valve changing , custom bid for services - depres cyl stacking desta etc , custom bid for services - 47 point 5 kg excavation flg valve ch , custom bid for services - pre inspection of cylinder , custom bid for services - observing for body leak , custom bid for services - manpower reqd at pump house , custom bid for services - filling cyl 5 kg , custom bid for services - flg of 425kg 2kg flame plus , custom bid for services - manpower support