In order to improve the performance of shell-and-tube heat exchanger, a new kind of in-tube heat transfer enhancement technology of twined coil insert is presented.

为了提高管壳式换热器的性能，提出了一种新型管内强化传热技术———绕花丝内插物。

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The only way to alleviate the pressure is to insert a tube or shunt to drain it.

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Lotem said that during the heart catheterization procedure doctors would use a thin plastic tube to insert an "umbrella-like" device that will seal the hole between the two upper chambers of the heart.

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