Class 037
Construction and Repair Services
Air cooling apparatus; gas scrubbing apparatus; oxygen generators; nitrogen generators; argon generators; acetylene generators; carbon dioxide generators; hydrogen generators; dinitrogen monoxide generators; dischlorosilane generators; trichlorosilane generators; tetrachlorosilane generators; xenon generators; krypton generators; neon generators; gas cleaners and purifiers; gas purification installations; air separation apparatus; burners for industrial use; gas burners for industrial purposes; heating apparatus for solid, liquid or gaseous fuels.