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〔本刊讯〕上月底，由上海市商业经济研究中心主持召开新闻发布会，推荐、介绍杭州华滤膜工程有限公司生产的JY－2型膜式家用净水器。该产品包含有三项国家专利：一是中国发明专利──“聚丙烯中空纤维微孔膜的制备新方法”；二是实用新型专利；三是外观设计专利。用制备新方法
At the end of last month, the Shanghai Municipal Center for Business Economics hosted a press conference to recommend and introduce the JY-2 membrane domestic water purifier produced by Hangzhou Huamao Membrane Engineering Co., Ltd. The product contains three national patents: one is a Chinese invention patent—“a new method for the preparation of polypropylene hollow fiber microporous membranes”; the second is a utility model patent; and the third is a design patent. Using a new method of preparation