三川智慧：公司智慧水务板块主营业务是各类水表的生产、销售

Group 1 - The core business of the company in the smart water sector includes the production and sales of various types of water meters [1] - Main products consist of IoT smart meters, ultrasonic water meters, and electromagnetic water meters, focusing on hot and cold water measurement [1] - The smart water meters are primarily made with copper and stainless steel casings [1]