即使站间管路一样,各压气站类型相同,各站的吸入压力pZx和排出压力pQx也不相同。In conclusion, even if the pipelines between stations are the same and the types of compressor stations are the same, the suction pressure pZx and discharge pressure pQx of each station are also different.原因:除存在自用气外,末段管路和末段的终点压力与其它站间不同。Reason: in addition to the existence of self-use gas, the terminal pressure of the end line and the end line is different from that of other stations.