A.0.05~0.06mm B.0.005~0.006mm C.0.04~0.05mm D.0.001~0.005mm
A.0.1mm B.0.5mm C.0.005mm D.0.001mm
A.耐磨性降低 B.疲勞強(qiáng)度降低 C.使用壽命延長(zhǎng) D.抗腐能力降低