A.軸承鋼 B.滲碳軸承鋼 C.塑鋼 D.中碳鋼
A.0.025~0.508mm B.0.025~0.54mm C.0.025~0.58mm D.0.075~0.54mm
A.外圈破損的軸承 B.車輛顛覆或重車脫軌后的全車軸承 C.退卸的新造197726型鋼保持架軸承 D.銹蝕嚴(yán)重,不能正常轉(zhuǎn)動的軸承