face to face duplex bearing

滚动轴承技术... ... extra thin section bearing 特薄壁轴承 face-to-face duplex bearing 面对面成对安装轴承（外圈窄端面相对） ...

face-to... ... face-to-face duplex ball bearing 成对双联向心推力球轴承 face-to-face duplex bearing 成对双联轴承 ...