Discusses the selection line methods of convey coal pipe of longdistance, from the angles of selection line principle, and the basic data to collect, etc.
本文从选线的原则、选线需搜集的基础资料等角度,论述了长距离输煤管道线路的选线方法。
2
Features and effects of in-factory quality supervision during manufacture of longdistance transmission linepipe are discussed. It is suggested that understanding standard should be improved.