誉帆科技：公司目前已开展自来水管网的技术研发以及业务活动

Group 1 - The company has initiated research and business activities related to water supply pipeline technology and holds three patents [2] - Currently, revenue from the water supply business accounts for less than 1% of the company's total revenue [2] - The company has not yet engaged in research or business activities related to gas pipelines [2]