AMMONIA/REFRIGERANTS (REFRIGERATION ENGINEERING)
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BTINORGANIC REFRIGERANTS (REFRIGERATION ENGINEERING)
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BTECOLOGICALLY HARMLESS REFRIGERANTS (REFRIGERATION ENGINEERING)
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UDC621.564,31
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Descriptor GERAMMONIAK/KÄLTEMITTEL (KÄLTETECHNIK)
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Descriptor ENGAMMONIA/REFRIGERANTS (REFRIGERATION ENGINEERING)
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Descriptor FREAMMONIAC/RÉFRIGÉRANTS (TECHNIQUE DU FROID)