A core regulating pad ring is padded on the lower ring of the thrust bearing, which can make the hook swing in any directions corresponding to the connecting cylinder.

在推力轴承下圈垫上调心垫圈，可使吊钩相对连接筒在任意方向上摆动。

youdao

It consists of a base and two ring type devices which can be worn onto the finger pad which is the most sensitive part of the finger.

它由一个基座和两个环状设备组成，可以套在指垫上，而指垫是手指上最敏感的部位。

youdao

At installation, insufficient compression of the sealing pad behind the carbon ring seal of the expander results in oil entrance to expander body and to the corresponding pipeline.

由于膨胀机碳环密封后面的密封垫片在安装时未被充分压紧，使膨胀机机体及相应管道进油。

youdao

In the case of the Challenger, the culprit was a simple O-ring that had become too brittle to do its job after a freezing night waiting on the launch pad.

FORBES: BP Oil Spill Investigation Will Focus On Blowout Preventers