It is not only wear-resistant, but also of good gas permeability.
它不仅耐磨，而且具有良好的透气性。
One of the main methods to test the gas permeability is using partial pressure difference.
用压差法测试塑料薄膜的透气性，是一个长期使用的主流测试方法。
According to the feature of the gas permeability, the perforation completion model was bettered.
针对气体渗流的特征对射孔完井模型进行了改造。
Radial and tangential gas permeability of Masson pine wood were measured respectively in this paper.
分析和讨论了影响马尾松木材渗透性及其各向异性的机理。
The axial gas permeability of wood samples was measured with rising-water volume-displacement method.
渗透性的测定采用水上升置换气流法。
Gas permeability and permselectivity of the inorganic membrane catalytic reactor have been investigated.
考察了气体在膜催化反应器中的渗透性能与分离性能。
Metals are good electrical conductors with high strength and usually have no porosities for gas permeability.
金属是具有较高的强度、导热性和气密性的良导体。
Metals are good electrical conductors with high strength and usually have not porosities for gas permeability.
金属是具有较高的强度、导热性和气密性的良导体。
The new equations for gas permeability of the coal samples are formulated by the numerical simulations of experimental data.
并根据大量的实验数据，拟合得到含瓦斯煤的渗透率随围压和孔隙压力变化的经验方程。
It features no Cl and toxic contents, higher water, oil and gas permeability and better strength resisting 4 Kg of pressure.
本超微滤芯无氯无毒、有较好的透水、透油和透气性，且强度良好，可抗4公斤的油或水的压力。
Experimental study was conducted on the influence of pore gas pressure upon gas permeability with gas permeation test device.
运用瓦斯渗透测试设备，进行孔隙气压对煤体渗透性影响的实验研究。
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。
Hollow fiber membranes with good gas permeability can be obtained after the extraction of the paraffin oil and stretching to a small extension.
将石蜡油提取掉后稍加拉伸即可得到透气性很好的微孔中空纤维渗透膜。
The effects of composition and pressure of its precursor on the properties, such as gas permeability, porosity, and electric resistivity, were studied.
研究了配料组成和前驱体成型压力对多孔碳板的气体透过性能、孔隙率、和电导率等指标影响。
Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production.
高瓦斯低透性煤层的瓦斯抽放，一直是煤矿安全生产过程中的重大技术难题。
The leather treated using fluorine containing retanning agent has a soft hand, good gas permeability, and better water , oil and soil resistances and so on.
含氟复鞣剂可以赋予皮革良好的手感、优异的透气性、抗水抗油性、抗污性等性能。
Preparation of some new sealants for cavity-glass is described, and their gas permeability coefficients, adhesion, weather resistance are discussed and compared.
介绍了几种新型中空玻璃密封胶的配制，并对其气体渗透系数、粘接性能、耐候性等进行了讨论和比较。
The gas permeability of EBR which have the same epoxide number decline with the amount of carbon black and sulphur, and increase with the amount of plasticizer.
同一环氧值的ebr硫化胶气密性随配方中炭黑、硫磺用量的增加而升高，随增塑剂用量的增加而降低。
Result Hydrophobic coating porous plate could evidently increase the water retention pressure, but also increase pressure drop of gas permeability in varying degrees.
结果憎水涂层多孔板的水滞留能力显著提高，但其渗透压降也不同程度地增加。
The obvious slippage effect for gas flow has been found due to the low gas permeability, and the effect of coal matrix shrinkage on the permeability is also indispensable.
低渗透气藏中的气体渗流具有明显的滑脱效应，同时煤基质收缩效应对煤层渗透率的影响也是不容忽视的。
During mechanical longwall top coal mining, the gas permeability in top coal ahead of working face has bigger difference compared with slice mining due to the increase of mining height.
综放开采由于采高的加大，导致采场前方顶煤中瓦斯渗透性与分层开采有较大的差异。
Application: Suitable designed for usage in fuel hose where resist to gasoline, diesel and alcohol-enhanced fuels. low gas permeability allowed the hose for other gas tight application.
使用合适的设计，使燃油管在输送汽油、柴油时减少了燃料损耗。降低了气体渗透性。允许软管输送其它气体。
The experimental studies and the dynamic simulation calculation to water influx reveal that gas permeability has a high sensitivity to water saturation in the tight sandstone gas reservoirs.
通过实验研究及水侵过程的动态模拟计算，揭示了致密砂岩气藏气体渗流能力对含水饱和度的高度敏感性。
The results of the test have shown that the operating technology for colloidal silicate binding is comparatively simple and the strength and gas permeability of the mold are comparatively good.
通过与硅酸乙酯水解液粘结剂的比较表明，以硅溶胶作为透气性金属陶瓷材料的粘结剂，其材料的制造工艺简单、强度较高、透气性较好。
This test method has the advantages of simple on the operation and good of airproofness. It is believable and reasonable to use this method for assessing the gas permeability property of concrete.
实验证实，本方法具有操作简便、密封性能好、测试数据可靠的特点，以此方法来评价混凝土的气体渗透性能是合理可信的。
Aqueous trapping display in two aspects, one is the reduction of mobile gas and the degression of gas permeability, the other is the decline of gas production rate and the decrease of gas recovery.
水相圈闭损害主要表现在两个方面，内部表现为可动气量的减少和气相渗透率的下降，外部表现为产气量的下降和气藏采收率的降低。
In this paper, influence of the morphology of polyethyleneterephthalate (PET)films under biaxial stretching on the gas permeability has been investigated by using polaris cope and electron microscope.
本文用电子显微镜和偏光显微镜研究双轴拉伸聚对苯二甲酸乙二酯（PET）形态结构对透气性能的的影响。
So the impact of remains water should be considered in study of gas seepage law in low permeability media.
因此，在研究低渗透介质中气体渗流规律时要考虑残余水的影响。
So the impact of remains water should be considered in study of gas seepage law in low permeability media.
因此，在研究低渗透介质中气体渗流规律时要考虑残余水的影响。
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