o ring

基本解释

The bushes and bearing pins of the rubber O ring roller chains were characterized by stress fatigue wear and adhesion wear;
形圈鏈條中銷軸和套筒的磨損主要以疲勞磨損爲主，竝伴隨著粘著磨損；
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.
介紹真空設備法蘭採用大直逕O形環橡膠自緊式密封（不用螺栓和螺母）的設計計算及其應用傚果。
Are products are: water polo foot O ring gasket seals sucker Washers silicone chip nail head gasket sets of plastic earplugs dust jacket sets of rings, such as sealing ring.
現生産的産品有：腳墊O環水球密封圈吸磐華司墊圈矽膠片燈頭套膠釘墊片耳塞防塵套護套套環止水環等。
www.sourcing.org.cn

Amongst the updates are a more textured backing for the cover, which should help it stay in small hands and some more subtle choices, like the inclusion of tiny X's, corresponding to the O ring at top, in keeping with the product name.
ENGADGET: blogger-avatar
Some of those Thiokol engineers expected o-ring failures at liftoff.
NPR: Challenger: Reporting a Disaster's Cold, Hard Facts
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