EN 12939-2000 建筑材料和制品的热性能.使用带保护热板和热流量计法测定热阻.高热阻和中等热阻的厚制品
Thermal Performance of Building Materials and Products - Determination of Thermal Resistance by Means of Guarded Hot Plate and Heat Flow Meter Methods - Thick Products of High and Medium Thermal Resistance