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| Number | Title | Issue Date |
| 7288197 | Biological membrane filtration system for water treatment and a water treatment process The present invention discloses a biological membrane filtration wastewater treatment system including a porous biological filtration bed zone and a membrane separation zone. The porous biological filtration bed zone has the dual function of providing biological tre... | 10/30/2007 |
| D504709 | Football | 05/03/2005 |
