北新建材：公司旗下灯塔涂料产品有服务于航空航天领域，目前该部分产品销售收入占公司总营业收入的比重很小

Group 1 - The company has a product line, Lighthouse Coatings, that serves the aerospace sector [2] - The revenue generated from aerospace-related products constitutes a small portion of the company's total operating income [2]