Based on the flow mechanism and performance of gas liquid two phase plug flow in oil gasgatheringline, a slug unit are divided into both gas slug region with liquid film and liquid slug region.
The living room is the natural gasgathering place should be stable, should not be the living room planning in line, so that people walking too frequently.
客厅是聚集旺气的地方，应要求稳定，不应将客厅规划在动线内，使人走动过于频繁。
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The hydraulic calculation of vent line is an interesting but difficult problem in natural gasgathering engineering design.