The interior of the tube must be kept a hard vacuum to preserve the photo cathode.

显象管内部一定要保证高真空才能保护光电阴极。

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The sealing strips seal the suction zones towards the roll interior where no vacuum is created.

密封条用于密封朝向（非真空的）辊内部的抽吸区。

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Tami Giammarco, lead engineer on the van's interior, said the vacuum idea came from the daughter of an engineer who saw how frustrated her father was when kids made a mess in his van.

WSJ: Honda Odyssey: The minivan with its own vacuum