Threaded O-ring seal helps prevent leaks.

螺纹O形圈使密封更好。

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Nowadays, the piston ring seal is really what the break in process is all about.

如今，磨合就是在磨合活塞密封环。

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Start stem O-ring seal over stem, then press into position as handle is pressed down over stem.

从阀杆上的阀杆O形环密封开始，然后在手柄安装在阀杆上后，将其压进手柄的位置上。

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The butler and the housekeeper get a seal ring and ten dollars each.

VOA: special.2011.08.13

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

He will surrender his gold ring of office, known as the fisherman's ring, and his personal seal will be destroyed in the same way as when a pope dies.

BBC: Benedict XVI to be known as 'pope emeritus'