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。
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