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随着西气东输工程的顺利完成,我国北方城市气源得到进一步保证,燃气事业有了较大的发展,己成为城市的重要基础设施和现代化城市的重要标志。伴随着供气管网的不断发展延伸,各种对管网设
With the successful completion of the West-East Gas Pipeline Project, the gas supply to the cities in the north of our country is further guaranteed. The gas business has enjoyed a great development. It has become an important symbol of the city’s important infrastructures and modernized cities. With the continuous development of gas pipe network extension, a variety of pipe network design