转K4型转向架摇枕斜楔摩擦面磨耗板开焊及裂纹成因探讨
전K4형전향가요침사설마찰면마모판개한급렬문성인탐토
Discussion of Causes to Weld Breaking and Cracking in Wear Plates on Bolster Wedge Friction Planes for Zhuan K4 Bogies
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