Wrap the 'o' Ring in tissue and pull the 'o' Ring through the tissue. This wipes the 'o' Ring clean as it passes through the tissue.

一边用纸巾擦o型圈，一边拉o型圈。这可以让O型圈通过纸巾的时候被擦干净。

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Give the 'o' ring (or 'o' rings if there are more than one) a wipe with another clean tissue.

用另一张干净的纸巾来擦拭O型圈(一张纸巾擦一个O型圈)。

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Rational matching of O-rings and O-ring grooves is of great importance to prolonging the service life of O-rings.

形密封圈和密封圈槽尺寸的合理匹配是延长密封圈无泄漏密封寿命的必要保证。

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Exult o shores, and ring o bells!

VOA: special.2009.12.31

Way back in November of 1985, on just its second mission, Atlantis experienced a blow-back of hot gases past the primary O-rings in one of its solid rocket boosters, resulting in serious erosion of said O-ring.

ENGADGET: Space Shuttle Atlantis ends its run of predicting disaster for other NASA shuttles

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