一種設計用於固定在基座上的部件,用於構成可拆卸軸承的殼體,或者軸承本身也可以是殼體的組成部分。它用於防止灰塵和/或異物進入,保留潤滑劑,並定位軸或類似物。
zzzy criticality code justification, material will be in accordance with navicp activity hx quality control, manufacturing and testing specifications reference number differentiating characteristics