单词 | helium II |
释义 | helium II helium II n.(名词)Liquid helium existing as a superfluid below the transition point of approximately 2.2&9{=}K at 1 atmosphere and having extremely low viscosity and extremely high thermal conductivity.(低温物理学用语)氦II:液体氦,转变点之下以超流体形式存在,1个大气压下转变点为约2.2&9{=}K,具有极低的粘稠度,但有极高的热传导性 |
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