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一、引言预应力钢筋混凝土电杆在高压输电线路中获得广泛应用,但是,近年来各地发现在使用过程中出现纵向裂缝,并且日益普遍和严重。这一状况,引起了全国线路工作者的关注。
I. INTRODUCTION Prestressed reinforced concrete poles have been widely used in high voltage transmission lines. However, longitudinal cracks have been discovered in various places in recent years and are becoming increasingly common and serious. This situation has aroused the attention of line workers across the country.