| 摘要 |
A body supporting device such as mattresses, box springs, cushions and car seats having an inner coil spring structure are provided with adjustable firmness by means of a plurality of inflatable pneumatic members. The pneumatic members are positioned within the interstices formed between adjacent coil springs in a variety of patterns. The pneumatic members are connected to an inflation control device for adjusting the firmness of the body supporting device in varying modes, including a pulsation mode to provide a messaging affect.
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