不含滾珠軸承、滑動軸承或滾柱軸承的單件或多件式組件。其設計旨在滿足各種或特定的安裝條件。對於帶有軸承的組件,請參閱滾珠軸承單元;滑動軸承單元;以及滾柱軸承單元。
zzzy criticality code justification, quality control in accordance with navships 0948-045-7010 material identification and control instruction for level 1 items reference number differentiating characteristics, aluminum alloy overall material