6
UNWROUGHT AND PARTLY WROUGHT COMMON METALS AND THEIR ALLOYS, ROLLED AND CAST BUILDING MATERIALS, METALLIC PIPES AND TUBES, WIRE NETTING AND SCREENS; METALLIC CONTAINERS FOR THE TRANSPORTATION, STORAGE AND EVAPORATION OF LIQUEFIED GASES, PRESSURE-GAS CYLINDERS, AND PARTS OF ALL OF THE ABOVE GOODS
11
VAPORIZERS AND HEATERS FOR THE EVAPORATION OF LIQUEFIED GASES; APPARATUS FOR THE SEPARATION AND PURIFICATION OF TECHNICAL GASEOUS MIXTURES, PETROLEUM FRACTIONS, REFINING GASES AND NATURAL GASES; APPARATUS FOR THE CRACKING OF LIQUID AND GASEOUS HYDROCARBON MIXTURES; APPARATUS FOR THE LIQUEFACTION OF GASES, COMPRISING CONTROL VALVES, EXPANSION VALVES, HEAT EXCHANGERS, SEPARATORS, ABSORBERS, COOLERS, AND REGENERATORS FOR REFRIGERATION, LOW TEMPERATURE GAS SEPARATION, CHEMICAL PROCESSING AND METALLURGICAL PLANTS; STEAM GENERATORS; BOILERS; GAS DRYERS; GAS SCRUBBERS (NOT BEING MACHINES); IMPURITY ABSORBERS; APPARATUS FOR THE PRODUCTION OF HEAVY WATER BY ABSORPTION, DIFFUSION, EXCHANGES, DISTILLATION AND LIQUEFACTION PROCESSES; APPARATUS FOR THE SEPARATION OF AIR BY LOW-TEMPERATURE RECTIFICATION; APPARATUS FOR THE PRODUCTION OF ARTIFICIAL SNOW; APPARATUS FOR DISTILLING AND RECTIFYING; DISTILLING AND RECTIFYING PLATES; REFRIGERATION PLANTS FOR SPACE-SIMULATION CHAMBERS; HYDROCARBON-CRACKING FURNACES; CRACKING-GAS COOLERS AND QUENCHING COOLERS; AND PARTS OF ALL THE ABOVE GOODS