| 释义 |
helium IIn.（名词）- Liquid helium existing as a superfluid below the transition point of approximately 2.2°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°K，具有极低的粘稠度，但有极高的热传导性
|