| 摘要 |
<p>The invention relates to a spring mattress comprising a plurality of interconnected coil-spring elements (1), said mattress having at least two layers extending in parallel with the plane of the mattress and each exhibiting different properties of resilience. The features characterising the mattress in accordance with the invention are that the same coil springs extend across both said layers and that these coil springs exhibit a higher degree of bias only along part of their extension, thus forming said layers exhibiting different properties of resilience.</p> |
