| 单词 | high-vacuum insulation | 
| 释义 | high-vacuum insulation [`hī ¦vak·yüm ´in·sǝ`lā·shǝn]  CHEMICAL ENGINEERING High vacuum between the walls of double-wall vessels to serve as thermal insulation at ultralow (cryogenic) temperatures, such as in Dewar vessels.  | 
	
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