多项选择题
A.尖轨跳动 B.尖轨不密贴 C.尖轨爬行 D.尖轨磨耗
A.900mm B.762mm C.600mm D.1435mm
A.14mm B.15mm C.13mm D.12mm
A.5mm B.7mm C.2mm D.12mm
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