中铁工业：公司主营业务为盾构机、道岔、钢结构、工程机械等产品和服务

Core Viewpoint - The company, China Railway Industry, is a leading manufacturer in the field of tunnel boring machines (TBM), railway switches, steel structures, and construction machinery, holding significant market positions both domestically and internationally [2]. Group 1: Company Overview - The company is the largest global producer and seller of TBMs, as well as the largest manufacturer of railway switches and bridge steel structures [2]. - It is recognized as the only industrial enterprise in the A-share main board market that specializes in high-end equipment for rail transit and underground excavation [2]. - The company's core products, including TBMs, railway switches, steel bridges, and special engineering machinery, have been exported to numerous countries and regions worldwide [2]. Group 2: Market Position and Achievements - The TBM, often referred to as a "Chinese business card," has maintained the highest global production and sales for nine consecutive years [2]. - The company has made significant advancements in product performance and technology through years of competition and collaboration with domestic and international peers [2]. - The company's contributions have played a vital role in the rapid development of global infrastructure construction [2].