| 摘要 |
<p>A mattress or other supporting unit comprises a number of layers of filling (1; 5, 7, 5', 7') and an outer covering (4, 6, 10). A barrier (4, 6, 9, 18, 19; 21, 22, 23) to the passage of infectious agents is provided adjacent to at least one of the layers and within the outer covering.</p> |
