Winding the silk solution on a rotating mandrel provides control of tube properties like winding pattern, tube porosity and composite features.
将丝蛋白溶液涂在旋转卷筒上，可以对图案、管开孔率以及复合特性进行控制。
2
Diagenesis control the porosity evolution, with symbolic meaning, it is very important for the exploration of the oil and gas.
成岩作用控制孔隙演化，对油气开采具有重要的指示作用。
3
The structure and its control of the porous aluminum prepared by a special pressure infiltration process was studied , for which a model for calculating the porosity of porous metals was developed.