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US4294077A Cryogenic refrigerator with dual control valves 失效
带双控制阀的低温冰箱

Cryogenic refrigerator with dual control valves
摘要:
A cryogenic cooler is disclosed which features a displacer and refrigerant flow control means comprising a first slide valve moveable by the displacer means and a second reversible valve operable separately from the first slide valve.
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