It was a method of refrigeration which rolls from his work in low-temperature physics.
这是一种制冷方法，源于他在低温物理学方面的工作。
Graduation Practice Group; Low Temperature Physics Speciality; Department of Physics; Peking University;
北京大学物理系低温物理专业七二级毕业实践小组；
Graduation Practice Group; Low Temperature Physics Speciality; Department of Physics; Peking University;
北京大学物理系低温物理专业七二级毕业实践小组；
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