LYC轴承
TWB轴承
TMB轴承
PEER轴承
TR轴承
HRB轴承

Fatigue Peeling	Abrasion	Crack, Fracture	Indentation, Bumping	Rustiness, Corrosion
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Crack refers to the crack damage happened to raceway or the rolling element. If continue to use it, the crack will be developed into cranny.