| 摘要 |
Two or more beams (1) support a plurality of segments arranged perpendicularly. Each of those segments comprises a lower and an upper lamellae (2, 4) made of elastic material. At least two struts (3) are alternatingly arranged with the beams (1). A fabric or similar material holds together the segments, forming pockets (5a) within which the lamellae are inserted, tubes (5b) to fix the struts (3), and presenting surfaces (5c) arranged between the lower and upper lamellae (2, 4). |
