一種均質球體,由一系列球體構成,構成軸承中的滾動元件,即球(經過改良)。此部件主要用於減輕摩擦。它也可能用於其他用途,例如球式止回閥中的止回部件。不含:止回球;附孔球閥。
special quality control testing special test features, 66 fed std single material response overall material document and classification, as differentiated by material which must conform to ships parts control center special quality control provisions reference number differentiating characteristics, steel comp 440c overall material, 0.3750 inches nominal rolling element diameter