In this article, a new kind of pulse tube refrigerator with low temperature switch valve and liquid nitrogen precooler is introduced.
对新型的带有液氮预冷的低温旋转阀式脉冲管制冷机进行了实验研究，得到了一些有意义的结果。
CTR Series magnetic temperature switch is the use of temperature sensitive materials, ferrite soft and hard materials, and reed combination.
系列磁敏温度开关是利用铁氧体软磁温敏材料和硬材料，以及干簧管组合而成。
CTR Series magnetic temperature switch is the use of temperature sensitive materials, ferrite soft and hard materials, and reed combination.
系列磁敏温度开关是利用铁氧体软磁温敏材料和硬材料，以及干簧管组合而成。
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