| 摘要 |
<p>The cell (1) has an elongated inflatable housing (2) provided with two main opposed side surfaces (20d, 20e) and oblong welds (7A, 7B), where one of the welds has longitudinal axis (7a) perpendicular to a main longitudinal axis (2a) of the housing. The oblong welds are spaced apart along the length of the housing and connect the side surfaces of the housing. An internal sheet (6) is positioned between the side surfaces of the housing and is welded to the side surfaces by the welds. The housing comprises two superposed lower and upper chambers corresponding to superposed air cushions.</p> |
