Graduation Practice Group; LowTemperaturePhysics 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；
2
The results in this thesis have an instructive meaning for fundamental study of lowtemperaturephysics, and for the technological applications of space simulation and vacuum insulation.
本文的结果对低温物理的基础研究以及宇宙模拟，低温真空绝热技术等应用领域具有一定的指导意义。
3
It was a method of refrigeration which rolls from his work in low-temperaturephysics.