一条大型输气管，各个时期的输气量不会相同，从投产初期的不满负荷运行到全部运转时的满负荷工作。同样可以从前面介绍的计算中，找到输气管不同时期的压气站数。这时，必须注意到压气站在不满负荷时，不一定是全部机组投入运行，压气站特性方程中A和B的数值将有所变化。A large gas pipeline will not have the same volume of gas in different periods, from the initial load of operation to the full load of operation. It is also possible to find the number of compressor stations in different periods of the gas pipeline from the previous calculation. At this time, it must be noted that when the compressor station is not under load, not all units may be put into operation, and the values of A and B in the characteristic equation of the compressor station will change.