A.0.01~0.015mm B.0.02~0.03mm C.0.04~0.05mm D.0001~0.005mm
A.粗研磨孔 B.精研磨孔 C.半精研磨孔 D.細(xì)研磨孔
A.增加接觸點(diǎn)數(shù) B.糾正對(duì)角部分的扭曲 C.使接觸點(diǎn)分布均勻 D.糾正凹心