Original, contain in the heel lower part of sole a plastic pump, extend a canaliculus to arrive from pump the forehead of the shoe, point to in shoe forehead foot below have a few alveolus.

 
  • 原来,在鞋底的脚后跟下方装有一个塑料气泵,从气泵伸出一根细管到鞋的前部,在鞋前部脚指下面开有几个小孔。
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