由于圆锥模具缺陷造成的半成品滚子小端倒角缺陷， 滚子小端有尖锐的突出。
NIB : Green roller defect on the small end radius; caused by taper die failure. A sharp protrusion on the small end of the roller.
由于圆锥模具缺陷造成的半成品滚子小端倒角缺陷， 滚子小端有尖锐的突出。
NIB : Green roller defect on the small end radius; caused by taper die failure. A sharp protrusion on the small end of the roller.
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