| 摘要 |
<p>The device has a frame element (10) made of a metallic material e.g. steel, or high-strength plastic. Another frame element is made of a non-metallic material e.g. plastic, a mixture of plastic and wood such as waste wood, or a mixture of die cast, fused, grouted and/or sintered plastics such as recycling material of plastics. The later frame element is formed from longitudinal beams connected with each other by cross beams. The two frame elements are formed as upper and lower frame elements in an assembly position of the device, respectively or vice versa.</p> |
