递 送套管与第一断流阀机械相合，并被设计成防止递送套管延伸超过离导向套管远端预定的 距离。
The delivery cannula mechanically interacts with the first stop and is designed to prevent the delivery cannula from extending beyond a predetermined distance from the distal end of the guide cannula.
各导向机构由套管和可在套管中运动的长杆组成。
Each guide mechanism consists of a casing and a long rod which can move in the casing.
由于导向杆的引导和扶正作用，阻止了磨鞋、铣锥偏磨，解决了磨损套管现象，现场应用效果显著。
As the guide rod and righting the role of shoes to prevent the grinding, milling, and grinding cone side solves the wear phenomena, field application results are obvious.
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