| 摘要 |
A non-continuous venting dewar for safely storing a cryogenic fluid during a prolonged period of transit with minimized evaporation of the cryogenic fluid. The dewar is characterized in that between the inner storage tank of the traditional vacuum-jacketed cryogenic storage dewar and the outer shell thereof, there is placed a plurality of spaced-apart radiation shields, the innermost of which is of relatively greater mass than the others and can be reduced in temperature to approximately the level of the stored cryogenic fluid as the dewar is filled.
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