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The air permeability of leather and other shoe materials has the bi -differential property.
皮革及其它鞋用材料的透气性存在两向差异。
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The air permeability back board can be made of plastics or other materials.
透气背板可用塑料或其他材料制成。
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The air permeability back board can be made of plastics or other materials.
透气背板可用塑料或其他材料制成。
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