降低泥浆通过渗透介质时的滤失量的一种特殊泥浆添加剂。
A group of mud additives specifically designed to lower the volume of filtrate that passes through a filter medium.
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.
维生素C的局部皮肤中的应用渗透介质可以极大地提高了维生素C对胶原蛋白的生产情况。
The topical application of vitamin C in a skin-penetrating medium can dramatically enhance the availability of vitamin C for collagen production.
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