The cables allow visual permeability so as to not block it off completely.
电缆的视觉渗透性可以使它不完全封闭。
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。
Pore permeability is usually very high, but the reservoir permeability is not very high.
孔隙渗透率通常很大，但地层渗透率却不大。
Pore permeability is usually very high, but the reservoir permeability is not very high.
孔隙渗透率通常很大，但地层渗透率却不大。
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