The tube is sealed at both ends.

这管子两端是密封的。

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Cover is fixing on the tube plate with some sealed gasket by bolt.

端盖用螺栓将它们固定在管板上并加入垫片密封。

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We sealed the leak so the tube could hold air again.

我们封住了这根管子漏气的地方，可以再充气了。

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We sealed the leak so the tube could hold air again.

我们封住了这根管子漏气的地方，可以再充气了。

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