厦门钨业：盾构刀具产品客户包括中国中铁、中国铁建、中国交建

Core Viewpoint - Xiamen Tungsten's subsidiary, Luoyang Jinlu, is involved in the development of shield tunneling machine tools, specifically focusing on products like cutter heads and hard rock rolling cutters [1] Group 1: Company Products and Clients - The company provides shield cutter tools to major construction groups in China, including China Railway, China State Construction Engineering, and China Communications Construction [1]