大宏立：主营业务为砂石、矿山破碎筛分成套设备的研发、生产、销售

Core Viewpoint - Dahongli (300865) focuses on the research, production, and sales of complete sets of equipment for sand and stone, as well as mining crushing and screening [1] Group 1: Company Overview - The main business of the company includes the development, production, and sales of equipment for sand and stone, and mining crushing and screening [1] - The company provides integrated environmental-friendly intelligent crushing production equipment and overall solutions [1] Group 2: Industry Application - The company's products can be widely applied in the sand and gravel aggregate industry and the metal mining selection industry [1]