Application
1) Petroleum Pipelines 2) Natural Gas Pipelines 3) Coal Gas Pipelines 4) Water Supply Pipelines 5) Drainage Water Pipelines 6) Heat Supply Network Pipelines 7) Pressurized Air Pipelines 8) Common Gas Pipelines 9) Construction Foundation Piles 10) Steel Structure Buildings 11) Steel Structure Bridges 12) Seaports and Docks etc.