F 25 C |
PRODUCTION, WORKING, STORING, OR DISTRIBUTION OF ICE (frozen sweets, including ice-cream, their production A 23 G 9/00; concentrating solutions by removing frozen solvents B 01 D 9/04; purification of water by freezing
C 02 F 1/22; refrigeration machines, plants, or systems F 25 B; solidification of gases or gaseous mixtures F 25 J; freeze-drying F 26 B) [2] |
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