A.0 B.10 C.18 D.20
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