沃顿科技：目前公司超纯水膜业务在公司整体营业收入中占比较小

Group 1 - The core viewpoint of the article indicates that Wharton Technology (000920) acknowledges that the domestic ultra-pure water membrane market is primarily dominated by foreign brands [1] - The company's ultra-pure water membrane business currently accounts for a small proportion of its overall operating revenue [1]