The high expandability and low permeability of these materials led to the modification of the available experimental techniques and to the design of new equipment.
由于膨润土具有较高的膨胀性以及低渗透性，因而必须对传统的试验技术进行改进，并设计出新的试验设备。
High Pressure Densometers are the accepted standard for measuring the porosity, air-permeability or air-resistance of materials having low permeability.
高压透气度测试仪经检验合格产品，用于测量低透水性材料的孔隙度、透气度和气阻。
Influence factor for the high-permeability alloy are studied in this paper. Employing reasonable control process for heat treatment technology, the magnetic properties of materials were improved.
文章研讨了高磁导率合金磁导率的影响因素，可采用合理的热处理工艺制度加以有效地控制，从而提高材料的磁性能。
PVC flocking materials used by high-frequency hot press molding, gas valve back up, with both gas permeability and gas leak-proof function.
用植绒PV C料经高频热压成型，倒阀门气嘴，具有双层防漏气渗气功能。
The present invention is one kind of composite materials of fiber reinforced sulfaluinous cement with high water permeability.
本发明是特别适用于油田的一种纤维增强硫铝酸盐高渗透水泥石复合材料。
Shoe flour new materials with high frequency in the foot support ring provide excellent fit and the seamless fitting shoes structure and permeability, and durable.
真皮鞋面配高频新材料配以中足支撑环提供出色的合脚性，无缝鞋头结构合脚且透气性好，经久耐穿。
The compact rockfill materials are of the properties of high permeability, low compression, low failure strain and high shear strength.
压实堆石料具有强透水性、低压缩性、破坏应变低、抗剪强度高。各料场级配石料均能够作为面板堆石坝的筑坝材料。
The compact rockfill materials are of the properties of high permeability, low compression, low failure strain and high shear strength.
压实堆石料具有强透水性、低压缩性、破坏应变低、抗剪强度高。各料场级配石料均能够作为面板堆石坝的筑坝材料。
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