| 11. | They are less susceptible to blowing the O-ring seal if banged against something while in use.
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| 12. | The left nozzle O-ring seals were not flawed.
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| 13. | An O-ring seal in the right booster rocket failed at liftoff, leading to subsequent structural failures.
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| 14. | An O-ring seals off the tube, so that the naked electrodes do not contact the water.
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| 15. | In the case of Challenger, O-ring seals on the booster rockets failed in the bitter cold.
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| 16. | An O-ring seal keeps the plug from leaking.
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| 17. | We actually used the toilet wax ring seal for these types of things, but mostly for screws.
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| 18. | Last summer, Thiokol reported singeing of O-ring seals located in the nozzles of rocket motors after consecutive launches.
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| 19. | But the Norse never learned to use harpoons, and their animal-bone collections are strikingly absent of ring seals.
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| 20. | Options include a centrifugal liquid ring seal and a non-contacting inert gas purged labyrinth seal that eliminates leakage.
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