| 摘要 |
<p>In order to improve the transfer of heat from a warm fluid inside a heat exchanger tube (333) arranged in a hot air oven and comprising an elongated tube with a wall with an exterior surface and an interior surface, the interior surface is provided with at least one longitudinally extending interior wall (363 ', 363' ) which extends from one side of the interior surface towards another side of the interior surface.</p> |
