摘要：一种轨道式龙门起重机由于多年运行，其小车轮频繁出现走偏现象。
Abstract: the trolley wheel of some kind of gantry crane appeared the phenomenon of slanting. After several years' usage.
摘要：一种轨道式龙门起重机由于多年运行，其小车轮频繁出现走偏现象。
Abstract: the trolley wheel of some kind of gantry crane appeared the phenomenon of slanting. After several years' usage.
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