DRYREF

Steam generating apparatus, namely, heat exchangers for generating steam not being parts of machines; thermochemical reaction apparatus, namely, catalytic reactors for use in industrial processes for the production of hydrogen and carbon monoxide; gas generators for industrial utility gases, in particular hydrogen and carbon monoxide; steam reformers; gas purifiers, namely, gas purifier apparatus for the separation of liquids, solids, and gases from gas streams; gas separation apparatus; fluid and gas heaters and coolers, namely, heat exchangers not being parts of machines for heating and cooling gases and liquids, and heat regenerators in the nature of heat exchangers not being parts of machines