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Dilution refrigerator

cryogenic device for cooling to very low temperatures, with no moving parts in the low-temperature region, whose cooling power is provided by the heat of mixing of helium-3 and helium-4

Pronunciation
/daɪˈluʃn rəˈfrɪʤəˌreɪdər/
/dʌɪˈluːʃn rɪˈfrɪʤəreɪtə/