| 摘要 |
<p>The bag (1) has an upper and lower layers made of an air penetrable material, and an inlet opening (6). A strip (7) and a flexible section are provided adjacent to the inlet opening, where an entered air flow is deflected by the strip and the flexible section. The strip is made of a plastic foil, and the flexible section partially covers the inlet opening. The strip is fixed at an opposite end in the area adjacent to the inlet opening.</p> |
