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人类在大气中生活和劳动了这么多年以后,現在轉而在某些领域中向大气“宣战”,要求获得远比大气状态稀薄得多的气态空間——真空,来从事各种特殊的研究和生产工作。虽然远在三百多年以前的真空实驗“馬德堡半球”已經在某种意义上震动了世界,但它的真正发展还在于本世紀初发明了电子管以后。由于电子管的迅速发展,真空获得和測量技术相应地引起了強烈的需要和兴趣,促进了人們在这方面
After living and working in the atmosphere for so many years, humanity now turns to “war on the atmosphere” in some fields, demanding that it obtain a much thinner gaseous space - the vacuum - than atmospheric conditions to undertake various special studies and Production work. Although the vacuum experiment “Madlabburg Hemisphere” far more than 300 years ago has already shaken the world in a certain sense, its real development lies in the invention of the electron tube later this century. Due to the rapid development of electron tubes, the vacuum acquisition and measurement technology has caused a great demand and interest correspondingly, which has promoted people in this respect