Ultra-High Vacuum System 基本例句 超高真空系统 It is worthwhile attempting to use an ultra-high-vacuum system for such purposes.超高真空系统作此用途值得一试。 CelvasealTM leak sealant is compounded especially forsealing leaks in the high and ultra-high vacuum systems.特别应用于高真空和超高真空系统的密封和堵漏。