11 Air freezing apparatus and installations in the nature of freezers and cryogenic freezers for agricultural, commercial or industrial use; air freezing apparatus and installations in the nature of freezers and cryogenic freezers for use in food processing; apparatus and installations for use in freezing, namely, cryogenic freezers, for use in the cryogenic preservation of foodstuffs and plant materials; apparatus and installations for use in freezing, namely, cryogenic freezers use in the cryogenic preservation of medical materials; apparatus and installations for freezing, namely, cryogenic freezers use in the cryogenic preservation of bioplasma, human cells, stem cells and other human and animal biological products; product for use in freezing and preservation of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products, namely, apparatus and installations in the nature of freezers, cooling units for industrial purposes and cooling apparatus for medical storage purposes for the cooling of objects using liquefied gases; apparatus and installations for the cooling of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products for preservation purposes using liquefied gases, namely, freezers, cooling units for industrial purposes and cooling apparatus for medical storage purposes; chilling apparatus, appliances and machines in the nature of freezers and cooling apparatus for medical storage purposes; cold storage rooms for use in the freezing and preservation of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products; cooling appliances, installations and machines for use in the freezing and preservation of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products; cooling installations for deep freezing, namely, freezers, cooling units for industrial purposes and cooling apparatus for medical storage purposes; cooling apparatus, installations and machines for the preservation of foodstuffs, and for use in freezing plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products, namely, freezers, cooling units for industrial purposes and cooling apparatus for medical storage purposes; cryogenic apparatus, namely, cryogenic freezers for use in the preservation of foodstuffs, and the freezing of medical materials, bioplasma, human cells, stem cells and other human and animal biological products and plant materials; apparatus and installations for use in the cryogenic preservation of foodstuffs and the freezing of plant materials, namely, cryogenic freezers; apparatus and installations for use in the cryogenic preservation of medical materials, namely, cryogenic freezers and cooling apparatus for medical storage purposes; apparatus and installations for use in the cryogenic preservation of bioplasma, human cells, stem cells and other human and animal biological products, namely, cryogenic freezers and cooling apparatus for medical storage purposes; deep freezers; freezer storage units, namely, walk-in freezers; products for use in freezing and food preservation, namely, heat exchangers for the removal of condensate, not being parts of machines; installations for cooling for scientific or biotechnological purposes, namely, cryogenic freezers for use in the freezing and preservation of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products; level control valves being component parts of freezers, cryogenic freezers, and cooling apparatus for medical storage purposes, for use in the freezing and preservation of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products; electric liquid coolers; refrigerating chambers; refrigerating machines for use in industrial refrigeration; refrigerators, cooling apparatus and freezers for medical storage purposes; temperature control valves for use in the freezing and preservation of foodstuffs, plant materials, medical materials, bioplasma, human cells, stem cells and other human and animal biological products, namely, valves being component parts of freezers, cryogenic freezers, cooling units for industrial purposes and cooling apparatus for medical storage purposes; thawing apparatus utilising heat for use in food preservation, namely, refrigeration condensers