adiabatic absorption adiabatic demagnetization adiabatic expansion aerage aeration air cooling airing blast freezing chilling congealment congelation cooling cross-ventilation cryogenics deep freezing dehydrofreezing electric refrigeration food freezing freezing gas refrigeration glaciation glacification infrigidation mechanical refrigeration oxygenation oxygenization perflation quick freezing reduction of temperature refreezing refreshment refrigeration regelation sharp freezing super-cooling ventilation