第3题
实际工作中，由于地形、地质、经济和社会发展各方面的需要，往往事先规定某些站的位置。剩下的问题就是如何布置其余的压气站。对于这类问题，我们一般事先知道下列条件In practical work, due to the needs of the surface, geological, economic and social development, the position of certain stations should be prescribed in advance. The rest of the problem is how to arrange the rest of the pressure stations. We usually know the following conditions in advance for such problems：（）
A.线路的起、终点和全长，某些规定站的站址，各进气点和分气点的位置The location of the line, the finish line and the length of the line, the location of the station, the location of the points and the gas points###SXB###B.各段的任务输气量，各进气点的进气量和分气点的分气量，终点配气站的耗气量The task volume of each section, the air intake volume of each air intake point and the air distribution point, the air consumption of the terminal distribution station###SXB###C.首站的进站压力PZ1，终点配气站进站的最低压力P2minThe initial station
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更多“首站进、出口压力pZ1或pQ1稍有下降，对整条管道系统的输气量都会有较明显的影响。The slight decrease of inlet and outlet pressure pZ1 or pQ1…”相关的问题
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