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Place of origin
Date

Model of Frankl Regenerator Packing for Heat Exchanger, 1950

1950

'Hymatic' Miniature Gas Liquefier, 1966

1966
Early Collins type expansion engine used in helium liquefiers, by The British Oxygen Company Limited, England, 1970-75.

Collins' Expansion Engine from Helium Liquefier, 1970-75

1970-1975
Partially cutaway model of a gas-bearing cryogenic turbo expander, and a complete miniature rotor for the turbine, by The British Oxygen Company Limited, England, 1974.

Cryogenic Expansion Turbine from Gas Liquefier, 1974

1974