... Petro-gas & Oil field, Chemicals & Petro-chemicals, Coal-mine, Metallurgy, Pharmacy, SMT, Fire-resistance, lab, Air driving, and so ... , etc. Used in fields such as metal heating treatment, powder metallurgy, magnetic material, copper process, metallic mesh, galvanized wire, semiconductor ... And all generators are tested before they leave the factory. Our ISO-9001 certification is your guarantee of that ...