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。
"valve,angle relief psi, 1/2" x 3/4" ips" end item identification, astm a276 assn std single material response overall material document and classification, zzzy criticality code justification, steel comp 304 overall material, cleaning, packaging, and marking iaw mil-std-1330d reference number differentiating characteristics