Bi-directional ribbing system which includes four (4) full-height ribs in either direction and five (5) half-height ribs, thus providing strength while minimizing surface area contact.
英
美
释义
双向罗纹系统,包括四(4)全在两个方向的高度肋骨和五(5)半高肋骨,从而提供了力量,同时尽量减少接触面积。
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