air permeability tester,densometer

Study on the relationships between the structures,permeability and the pores of worsted fabrics;

精纺毛织物的孔隙与结构及透气性的关系

A new test method for air permeability of fiber assembly;

一种研究纤维集合体透气性能的新方法

Analysis of air permeability and moisture transmission properties of flax/jute lawn cultivation base;

黄麻/苎麻草坪培植基的透气透湿性分析

This review summarizes the structure, principal and several manufacture theories of waterproof and breathable polyurethane film, coating, and their applications.

综述了防水透气性聚氨酯薄膜及涂层的结构、原理及各种成型加工工艺及其应用。

Covered fabric is less breathable for the covering film is composed with macromolecule material, which prevents the air from premeating between the two sides of the fabric.

涂层织物在涂饰中所用的高分子材料薄膜的透气性较差,阻碍了空气的透过作用,导致涂层织物的透气性降低。

The　later　the　time　of　collection　of　the　seeds,the　weaker　the　ability　of　the　ventilation　of　seed　shell;the　stronger　the　inhibition　of　seed　shell　on　t.

结果表明，山楂种壳透气性差，能显著地抑制种子的呼吸。