| 摘要 |
A molded sole takes air in from the inside of the shoe and expels it through the heel, due to the pumping action carried out by a cushion, able to elastically deform once the foot pressure is applied. The cushion is housed within a chamber on the bottom of the sole and communicates through a longitudinal channel blocked by a single acting valve, with a ring on the heel which communicates with the interior through a vent area.
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