一、序言 最近极低温技术有了很大的发展。自从以液氮为冷阱,极低温真空技术方面得到应用以来,这种技术正被广泛地用于宇宙空间模拟室。 关于低温泵的应用,我国(日本──译者注)与外国相比,已经落后了一步。前年电气试验所对低温泵进行试制,并介绍了其性能。目前有很多外国的关 First, the preamble Recently cryogenic technology has made great progress. Since the application of liquid nitrogen as a cold trap and cryogenic vacuum technology, this technique is being widely used in space simulation rooms. With regard to the application of cryogenic pumps, our country (Japan - Translator’s Note) is already one step behind foreign countries. The year before the electrical test on the cryogenic pump trial production, and describes its performance. There are many foreign customs now