The result shows that it was the typical intergranular fracture, and there were scrappy claw and tiny pore in the fracture of crystal face.

结果表明：弹性垫圈断口为典型的沿晶断裂，在断裂的晶面上有细小的爪状纹和微孔。此为高强度钢氢脆断口的特征。

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Centrifugal glass cotton can sound-absorbing reason not because the surface is rough, but because of the internal and external connected with tiny pore and holes.

离心玻璃棉能够吸声的原因不是由于表面粗糙，而是因为具有大量的内外连通的微小孔隙和孔洞。

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The cementation of authigenic kaolinite may preserve the tiny intergranular pore-space, and slightly influence the porosity, and even increase the permeability.

自生高岭石胶结可保留粒间微孔隙，对渗透性影响较小，甚至可增强渗透性。

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