| 摘要 |
A filter membrane housed in a casing is a microporous membrane manufactured by the phase separation method and having a pore size of 0.1 to 0.8 mu , preferably 0.2 to 0.6 mu , and a thickness of 100 to 300 mu . At least one membrane unit comprising of such a membrane covering a core material is arranged inside the casing to define a blood channel of 50 to 150 mu channel thickness.
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