| 摘要 |
<p>A method for lifting a horizontal cover, e.g. for a swimming pool, has at least two masts each fitted with a winch driven by a reversible electric motor. The motors are driven by a synchronizing control with direct connection between the cover and the reels for s simple layout. The cover can be of any shape and the system also allows the cover to be lifted into a non horizontal position.</p> |
