The relationship between the mixed liquor suspended solid concentration, chemical oxygen demand and wastewater permeation pressure of the membrane was studied.

考察了废水中悬浮物浓度及化学需氧量与炭膜渗透压的关系。

The phase lag produced by the response of the well water level to variation of air pressure results from permeation of water between the well and aquifer.

由于水在井孔与含水层之间的渗流造成了井水位对空气压力变化的响应产生位相滞后。

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。

Therefore, lowered pressure should not be used in the exploitation of low permeation oil reservoirs.

因此在低渗透油气藏的开采中，不宜采用降压开采。

The permeation rate and separation factor decrease while increasing downstream pressure.

二次侧压增大，渗透通量和分离因子减小。