A.vc,f,ap B.f,ap,vc C.vc,ap,f D.ap,f,vc
A.磨料磨損 B.粘結磨損 C.擴散磨損 D.氧化磨損
A.ap,f,vc B.ap,vc,f C.vc,f,ap D.f,vc,ap