thermopermalloy

例句：

1. 1.Thermal conductivity is a crucial factor in determining the efficiency of heat exchangers.
   热传导率是决定换热器效率的关键因素。
2. 2.Thermal expansion is an important property of metals that affects their mechanical properties.
   热膨胀是金属的重要属性，影响其机械性质。
3. 3. Thermal radiation is a form of energy transfer that occurs between objects without direct contact.
   热辐射是一种无需直接接触的能源传递方式。