道氏技术：主要产品是陶瓷釉面材料及陶瓷墨水

Group 1 - The core viewpoint of the article is that Daoshih Technology is focused on providing high-quality inorganic non-metallic glaze materials for the building ceramics industry, including glazes, ceramic inks, and auxiliary materials [2] - The main products of the company are ceramic glaze materials and ceramic inks, which are essential for ceramic manufacturing [2]