A.單列向心球軸承 B.雙列向心球軸承 C.單列向心滾子軸承 D.雙列向心管子軸承
A.單列向心球軸承 B.雙列向心球軸承 C.單列向心滾子軸承 D.雙列向心滾子軸承
A.2 B.5 C.10 D.15