Its features are under sole opened inward has three elliptic hole, elliptic hole inside Ann has three spring, under the soles and soles through screw connection.

其特征是下鞋底里面开有三个椭圆形孔，椭圆形孔里面安有三个弹簧，下鞋底与上鞋底通过固定螺钉连接。

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Its features are under sole opened inward has three elliptic hole, elliptic hole inside Ann has three spring, under the soles and soles through screw connection.

其特征是下鞋底里面开有三个椭圆形孔，椭圆形孔里面安有三个弹簧，下鞋底与上鞋底通过固定螺钉连接。

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