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把醋酸纤维素制成胶囊膜，并将高吸水树脂封入胶囊中，制成高吸水醋酸纤维素胶囊膜，此膜可以用来浓缩水中的脲酶或悬浮微粒。
The cellulose acetate capsules made of film, and superabsorbent resin encapsulated in a capsule made of high water-absorbing cellulose acetate membrane, the membrane can be used to concentrate urease or suspended particles in water.