| 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> |
