沃尔核材：高速线业务主要直接客户包括安费诺、豪利士等国际客户，以及立讯、庆虹等国内连接器企业

Group 1 - The company provides high-speed copper cables (DAC, ACC, AEC) to major connector manufacturers like Amphenol, which are used in Google's data center AI server clusters for short-distance, high-speed data transmission [2] - The company's high-speed cable business is positioned upstream in the supply chain, with direct clients including international companies such as Amphenol, Huber+Suhner, Molex, and TE Connectivity, as well as domestic connector firms like Luxshare, Qinghong, and Huafeng [2] - These direct clients further process the cables before supplying them to major server manufacturers, including Google, for end-use [2]