摘要 |
<p>The device has a cover (1) with a container space, and a draining channel (2) equipped with a pulley system (3), where the cover is closed by a cap (4). Traction rings (20) are equipped with the pulley system for tractioning and detractioning a string (14). The cover is maintained by four strings (5), where the strings are slide on a top (11) of a central base plate (12). An attachment fitting (6) is retired in interior angles directions (7).</p> |