The air permeability and the randomness of air permeability test of different shoe upper leather, shoe lining single -layer material and compounded samples were studied.
对不同鞋面革、鞋里材料单层和复合试样的透气性及其测试的随机性进行了试验研究。
Usually if the shoe lever is 1 & 2, will also conduct wear test sample. No need for level 3.
通常，如果鞋子的级别为1&2， 必须生产试穿样品。 若级别为3 则没必要。
Usually if the shoe lever is 1 & 2, will also conduct wear test sample. No need for level 3.
通常，如果鞋子的级别为1&2， 必须生产试穿样品。 若级别为3 则没必要。
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