沃顿科技：超纯水业务目前在整体营业收入中的占比较小

Group 1 - The core viewpoint of the article is that Wharton Technology (000920.SZ) has indicated that its ultra-pure water business currently accounts for a small proportion of overall revenue, but the gross margin of its ultra-pure water membrane products is higher than the average gross margin of the company's membrane products [1] Group 2 - The ultra-pure water industry has high technical and quality requirements for membrane products [1] - The company’s ultra-pure water series membrane products have a gross margin that exceeds the average gross margin of its other membrane products [1]