成对双联轴承 [机] back to back duplex bearing ; [机] face-to-face duplex bearing

成对于双联轴承 back-to-back duplex bearing

双联球轴承 duplex ball bearing

成对双联推力球轴承 face-to-face duplex ball bearing

成对双联圆锥滚子轴承 face-to-face duplex tapered roller bearing