11 installations and devices for heating, steam generating, refrigerating, drying, and ventilating, namely, apparatus for the liquefaction and separation of air, apparatus for the separation, purification, scrubbing, liquefaction [ and reevaporation ] of technical gases, mineral oil fractions, refinery gasses and natural gas, apparatus for cracking liquid and gaseous hydrocarbon mixtures, [ apparatus for the production of synthesis gases and synthetic natural gas, apparatus for the liquefaction and gasification of coal, ] reactors for chemical transformations for the production of basic compounds in the chemical industry, namely, olefins, benzol, naphthalene, alcohols, ammonia, urea, organic acids; [ water purification and sewage disposal plants; chemical and petrochemical plants, namely, plants for the production of basic compounds in the chemical industry, namely, hydrogen plants, gas treatment plants, natural gas plants, pharmaceutical plants, environmental engineering plants, thermal process waste air cleaning plants; ] petrochemical process and refinery furnaces; cryogenic plants, namely, apparatus for the production, application, and maintenance of cryogenic temperatures, namely, helium liquefiers; [ apparatus for the preparation and maintenance of very low temperatures, cryostats; ] evaporators, [ condensors, ] distillation and rectification apparatus, heat exchangers, [regenerators, coolers, separators, ] adsorbers, scrubbing columns [, and boilers ] for use in the above-mentioned apparatus and plants; [ heatpumps, cooling/refrigerating installations, air conditioning apparatus for maintaining cool or cold temperatures in rooms or other volumes; refrigerating and freezing devices for use in household and industry, namely, units for use in stores and self services shops; non-refrigerated shop equipment, namely, lighting devices, air conditioning apparatus; gas injectors; ] pressure reducers, regulators, and valves of metal for use in gas supply systems; [ and waste heat-driven power installations and stations consisting of heat transformers and generators ]