永达股份：公司作为铁建重工核心供应商，全方位为铁建重工提供盾体、刀盘体、管片机等金属结构产品

Group 1 - The company is a core supplier for China Railway Construction Heavy Industry, providing a range of metal structure products including shield bodies, cutter heads, and segment machines [2] - The inquiry from investors highlights the company's role and the competitive landscape in the industry [2]