在1965年的起重机产品革命中,大连和上海厂各生产了二台单主梁电动桥式起重机,洛阳厂生产了一台双梁偏轨电动桥式起重机,三个工厂各自生产了二个偏轨箱形梁。在国家鉴定会上,肯定了3～50/12.5T新系列设计将采用独梁结构,因此,对偏轨梁制造中所碰到的问题重点地加以讨论是具有一定意义的。 In the crane product revolution of 1965, two single-girder electric bridge cranes were produced in Dalian and Shanghai plants, one dual-beam derailed electric bridge crane in Luoyang and three partial production in each of the three factories Rail box beam. At the national appraisal meeting, it is affirmed that the 3 ~ 50 / 12.5T new series design will adopt the single beam structure, therefore, it is of significance to discuss the problems encountered in the manufacture of the drift beam.