套筒套置在卡套下端，并设置在卡套与手柄之间。
A sleeve is sleeved at the lower end of the ferrule and arranged between the ferrule and the handle.
连接套位于接头管上的箭头与催化转化器套筒上的两个圆周凹槽的中心位置。
The position of the sleeves is located in the middle between the arrowheads on the connector tube and the two circumferential grooves on the socket piece of the catalytic converter.
针对小孔径瓷套机械加工难度大的问题，介绍了一种特殊的工艺装备套筒。
A special fixture-cylindrical sleeve is presented for mechanical processing of bushings with small inner diameter.
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