透气性测试。
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。
Good air permeability, waterproof, wind proof performance is the most important.
透气性好，防水，防风性能最要。
In a certain range, the air permeability of leather material has a certain randomness.
在一定范围内，皮革材料的透气性存在一定的随机性。
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。
Pervious concrete has a good air and water permeability.
透水混凝土具有良好的透气性和透水性。
It is its structure that gives leather its permeability to air and water vapor.
正是皮革的结构使皮革对空气和水气具有可渗透性。
It is its structure that gives leather its permeability to air and water vapor.
正是皮革的结构使皮革对空气和水气具有可渗透性。
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