金盾股份：通风系统设备主要应用于核电、地铁、隧道、水电等领域

Core Viewpoint - The company Jin Dun Co., Ltd. (300411) specializes in ventilation system equipment primarily used in nuclear power, subways, tunnels, and hydropower sectors, with project timelines typically ranging from two to three years, and sometimes exceeding three years [1] Group 1 - The company's business model is based on "sales determine production," meaning production is scheduled based on actual order demand, with a lead time of 90 days for manufacturing and delivery [1]