7
Filtering machines, separators and centrifuges; Filters for machines; Filters being parts of machines; Filters for waste gas purification, As parts of machines; Current generators; Superheaters; Compressors; Turbines, namely steam and gas turbines, steam condensers; Pumps [machines]; Blowing machines; Blowing machines for the compression, exhaustion and transport of gases; Blowing engines; Super-compressors; Spraying tower absorbers; Dust removing installations for cleaning purposes
11
Gas recovery apparatus; Industrial treatment installations; Gas cleaners and purifiers; Gas purification installations; Separators for scrubbing gas; Chemical processing equipment; Distillation columns; Vacuum distillation columns for industrial use; Gas scrubbers [parts of gas installations]; Heat exchangers, other than parts of machines; Gas and air purifying installations and machines relating thereto, namely mechanical filters for purifying industrial gases, Dust separators, Parts for the aforesaid filters, The aforesaid goods included in class 11; Separators [machines], namely Electric separators for filter and flue gas purification installations; Flue gas purifying installations and parts therefor, included in class 11; Gas scrubbers, namely machines and mechanical filters for purifying gases; Superheaters; Steam condensers; filters for gas and fume extractors; Filters for cleaning air; Flues and installations for conveying exhaust gases; Flue gas cleaning apparatus; flues and installations for conveying gases and emissions