The speed reducer upper on the main machine makes central axis rotate through shaft coupling and roller hanger rotates with central axis and rollers on the hanger roll around the inside of ring.
安装在主机顶部的减速机，通过联轴器连接中心轴旋转，中心轴带动磨辊吊架旋转，磨辊装在吊架上沿磨环内周一起滚动。
The casing hanger provides a means of ensuring that the string is correctly located and generally incorporates a sealing device or system to isolate the casing annulus from upper wellhead components.
套管悬挂器可确保套管柱被正确地放置，它一般包括一个密封装置，以便将套管环形空间与上部的井口部件隔离。
A limit latch is placed inside the upper part of the lock body, and a hanger column corresponding to the limit latch is placed on one side of the rotary disc of the rotary claw.
在所述的锁体上部内设有限位挂钩，在转动卡爪的转盘一侧设有与限位挂钩 对应的挂柱；
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