The design calculation of the large O ring rubber self energized seal (without bolt and nut )used for the vacuum equipment and its application results are introduced.

介绍真空设备法兰采用大直径O形环橡胶自紧式密封（不用螺栓和螺母）的设计计算及其应用效果。

youdao

Floating ring is a structure often used in the shaft end seal of centrifugal compressor.

浮环密封是离心式压缩机轴端密封经常采用的结构形式。

youdao

Manufactured by casting polyurethane, main seal ring used in expansion ring testing device for pipeline was designed.

采用浇注型聚氨酯材料，设计了一种管道用胀环试样试验台主密封圈。

youdao

To prevent forgery, Bertone will break the pope's fisherman's ring by hitting it with a small hammer, a tradition that was started when the ring was used to seal documents.

CNN: Huge challenges await next pope