| 摘要 |
<p>The frame (1) is assembled of four aluminum profiles (4) joined at the corners with angular elements (6) and an inner frame (2) holding the outer ends of several transversally positioned wooden slats (8). The inner frame (2) is divided into three segments (14) which can be individually raised and lowered. Four spring elements (9) made of plastic are attached to the upper surfaces of each of the slats (8). The elements (9) are assembled of a disk and a spiral stand underneath.</p> |
