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我厂研制的FY1型转向架,采用25.5米客车用试制车轴,图号为L78—01—21—01。此轴轴端结构基本与TB450—79中的RD_3轴相同,在φ130的轴颈外端有一个φ120×10的圆柱体,三个M22螺纹孔的中心圆直径为φ80(RD_3轴为φ85)。此转向架装于RW_(22)51055新造车上运用考验,为了解决
FY1 bogie developed by our factory adopts the trial production axles of 25.5 meters passenger car, drawing No. L78-01-21-01. The shaft end structure is basically the same as the RD_3 shaft in the TB450-79. There is a φ120 × 10 cylinder at the outer end of the φ130 journal. The center circle diameter of the three M22 threaded holes is φ80 (the RD_3 axis is φ85). The bogie was installed and tested on the RW_ (22) 51055 new car, in order to solve it