| 摘要 |
<p>The spherical, cylindrical or other shaped bags (2) can be filled with air or another medium so that the pressure of each is individually adjusted. The bags are retained between perforated sheets to enable the structure to breathe. An outter fabric cover encases the other components. Each bag is formed from two welded pieces of PVC and includes a conventional non return valve for inflating. The size of each bag is between 200mm and 600 mm. The pressure to which each bag is inflated varies with place within a mattress and the preference and anatomy of the user.</p> |
