三川智慧：公司可提供从DN15到DN300口径的NB-IoT物联网水表、超声波水表等多种计量产品

Group 1 - The company has a complete product line in the smart metering field, offering various types of water meters suitable for different applications and projects [2] - The product range includes NB-IoT water meters, ultrasonic water meters, and electromagnetic water meters, with sizes ranging from DN15 to DN300 [2]