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1. This paper studied two-dimensional steady laminar flow over a porous medium stretching surface with suction or injection.
   摘要研究了具有抽吸喷注的多孔介质延伸表面上二维稳态层流的流动问题。
2. In sum, in the case of laminar flow, the outside helical flow would have a little influence on MF of purity water.
   总之，在层流条件下，对于纯净水的微滤，外旋流的方式对微滤通量的影响并不显著。