| 摘要 |
A cryostat, which makes use of a cryogenic liquid at very low temperature, for example liquid helium, as a medium to surround a specimen being tested, comprises a double-walled tank disposed within and spaced from a double-walled insulating jacket under vacuum. The suspension of the tank is effected by a double annular connection with the bottom of the inner wall of the insulating jacket. A reflector screen is cooled by the nitrogen of a reservoir. The cryostat can be used for testing materials or for enabling apparatus to function at very low temperature.
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