钢研高纳：产品毛利率受成本及价格等因素影响存在一定波动

Group 1 - The company's net profit attributable to shareholders in the third quarter decreased compared to the same period last year, primarily due to factors such as cost expenses and asset impairment [2] - The company's product gross margin is subject to fluctuations influenced by costs and prices [2] - The equipment purchased by the company is mainly used for domestic production bases [2]