| 摘要 |
<p>The plate or track-shaped elements are used to extract environmental energy. The element is made with a longitudinal channel to convey a medium which extracts air from the surroundings. It can be used in the form of roof covering or wall cladding, etc. and is made from copper sheets. The copper sheet (1) is placed on a working plate (7) with a circular indentation (8). The copper section (2) is placed in the circular slot (6) to form a circular channel (5). It is welded to the sheet by ultrasonics.</p> |
