| 摘要 |
<p>A method of manufacturing bi-metal finned tubes wherein a tube of fin stock is assembled about a tube liner, and the assembled tubes are passed through an array of rotatable finning discs arranged to raise helical fins on the outer diameter of fin stock, while, at the same time, pressing its inner diameter tightly against the outer diameter of the tube liner, the trailing end of the tube of fin stock being restrained against longitudinal movement away from its leading end during such passage of the assembly of tubes.</p> |
