| 摘要 |
The improvements consist in the joining, into a single element, of a planar resistant base and an upholstered cover, which cover has the form of a pan (dish, housing), a foamed product which connects both elements and constitutes the elastic mattress being introduced into the intermediate centre of both elements. The fabric is connected directly to the resistant rigid base and on this base are placed the support legs for the whole assembly, forming a single and inseparable base assembly for mattresses.
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