| 摘要 |
<p>An improved automated spa cover lifting device and thermally efficient, foldable spa cover, the lifting device having a motorized expandable and retractable strut attachable to a spa housing and to at least one of two pivotal side arms that connect or support a folded spa cover to the spa housing during displacement with the preferred spa cover having a bevel at the fold to improve the thermal efficiency of the cover.</p> |
