| 摘要 |
The improvement in a porous hollow fiber having a large number of micropores in its surrounding wall, in which walls of said pores are coated with an essentially water-insoluble alkylcellulose derivative such as ethylcellulose, carboxymethylethylcellulose, hydroxypropylmethylcellulose acetate succinate or hydroxypropylmethylcellulose phthalate, or poly(2-hydroxyethyl methacrylate).
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