石英股份：目前公司主要核心半导体产品生产线集中于母公司

Group 1 - The core focus of the company is on the research, manufacturing, and sales of semiconductor-grade high-purity quartz materials [1] - The main products include various types of high-purity quartz tubes, rods, cylinders, and ingots [1] - The production lines for the company's core semiconductor products are primarily concentrated in the parent company [1]