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1·The effects of permeable pile groynes laid out along the thalweg in control and guide the regime of the lower Yellow River have been studied through movable bed model tests.

通过河工动床模型试验，对沿治导线布设形式的透水桩坝在黄河下游控导河势的效果进行了研究。

2·Saertu oil-bearing layer in Dabei Oilfield is an extra-low permeable reservoir bed.

大北油田萨尔图油层属于特低渗透储层。

3·The major pay bed is low permeable ultra dense sandstone. Its permeability and pore throat texture are very sensitive to the net pressure of overlying strata.

主要产层为低渗透超致密砂岩，其渗透率和孔喉结构对上覆地层净压力很敏感。