This document contains tags related to printed circuit boards (PCBs) including types of PCBs (e.g. multilayer boards), PCB manufacturing processes (e.g. electroplating, etching), and PCB applications (e.g. mobile devices). It also includes tags about the company providing information on PCB technology and equipment. The tags are in Chinese and cover topics such as copper plating, board thickness, and laser processing of PCBs and substrates.