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- Manufacture of filtering and purifying machinery or apparatus for liquids and gases (6)
- Manufacture of other general purpose machinery: fans intended for industrial applications, exhaust hoods for commercial, laboratory or industrial use; calendering or other rolling machines other than for metals or glass; gaskets and similar joints made of a combination of materials or layers of the same material and other general purpose machinery n.e.c., including manufacture of parts and accessories for general purpose machinery and equipment. (5)
- Manufacture of refrigerators or freezing equipment for commercial and other nonhousehold purposes and assemblies of their major components e.g. compressors and condensers mounted on a common platform even though motor, evaporator or cabinet is missing;; furniture designed to accommodate refrigeration of freezing equipment. (2)
- Manufacture of fire extinguishers and other equipment for projecting, dispersing or spraying liquids or powders whether or not hand-operated, including sand blasting machines, stream cleaning machines etc. (2)
- Manufacture of distilling and rectifying plants; heat exchangers; machinery for liquefying air or gas; producer gas or water gas and acetylene gas generators. (1)