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目前半数以上的货车都装用构造速度为120公里/小时的-X3-O型转向架。多年的运用经验和综合试验表明,这种转向架有很多缺点,阻碍着货车运行速度进一步提高。因此,近年来在制造速度为140公里/小时的转向架方面进行了科学研究和设计工作。由乌拉尔车辆制造厂与全苏铁路运输科学研究院,莫斯科、列宁格勒和第聂泊尔彼得洛夫斯克铁路运输工程学院和其他组织机
Currently more than half of the trucks are equipped with -X3-O bogies with a construction speed of 120 km / h. Many years of experience and comprehensive tests have shown that this type of bogie has many shortcomings that hinder the further increase of the running speed of the truck. Therefore, in recent years, scientific research and design work has been carried out in the manufacture of bogies at a speed of 140 km / h. By the Ural vehicle manufacturing plant and the All-Soviet Railway Transport Academy, Moscow, Leningrad and Dnepropetrovsk Petrovac Railway Engineering and other organizations