一种在电真空器件制造业中经常使用的真空技术保存方法 ,可用于文物保护 ,应该是一种科学而有效的方法。我是学习电子器件专业的 ,而且是电子器件中的电真空器件专业。具体地说 ,电子器件在外壳密封后必须在其内部空间造成真空。我毕业后在一家大型电子管厂工作二十多年。这家 A kind of vacuum technology preservation method often used in the manufacture of electric vacuum devices, which can be used for the protection of cultural relics, should be a scientific and effective method. I am a professional electronic device, but also a professional electronic vacuum device in electronic devices. In particular, the electronics must have a vacuum in their interior space after the enclosure has been sealed. After I graduated in a large tube factory for more than 20 years. this home