Gelonghui on November 15th: Beijing SDL Technology (002658.SZ) stated on the investor interaction platform that the company's main customer base currently covers electrical utilities, steel, petrochemicals, chemicals, building materials and other fields. The company's semiconductor electronic specialty gas industrial process analysis solution is aimed at monitoring electronic specialty gases including H2, O2, N2, Ar, He, CO2 in the semiconductor production process, continuously monitoring trace impurity gases at the ppb level.