... and even aperture, good resistance to high temperature, acid and alkali without shedding. Using multi-hole porcelain ... air purification and disinfection.1. Acid purification, such as hydrochloric acid, vitriol, hydrofluoric acid and phosphoric acid, etc.2. Alkali purification, ... , distilled spirit and sauce, etc. 4. Purification of industrial oil, such as benzene, diesel oil, aviation kerosene and ...