摘要 |
<p>The strip has a center piece and two lateral side parts that border the center piece. The two lateral side parts are formed such that the parts are drawable apart. The center piece comprises two filter shaped punched regions (1, 2), where diameter of holes is smaller than three millimeters and greater than 0.5 millimeters. The center piece and the two lateral side parts are manufactured from metal. An independent claim is also included for a method of manufacturing a strip.</p> |