With national most advanced air separate equipment, layout-of-gas equipment and analyzing and detecting instrument, Yujia is largest Specialty Gases Company of Dongying city. Various gases like oxygen, oxygen for industry, medicine, high-purity oxygen, liquid oxygen, nitrogen, high-purity nitrogen, liquid nitrogen, acetylene, carbon oxide, compressed air, argon, high-purity argon, high-purity hydrogen and other various gases used in building construction, machinery, chemical industry, glasses, metallurgy, medical and scientific research which over 75 percent of totally gases of dongying city