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在叙述第二类黑体辐射源简单历史的基础上，给出了第二类黑体辐射源的物理基础、物理模型及其有效发射率表达式。具体讲述真温度测量原理、发射率测量原理与方法、全热流测量原理与方法。
Based on the brief history of the second type blackbody radiation source, the physical basis, physical model and effective emissivity expression of the second type of blackbody radiation source are given. Specific about the true temperature measurement principle, emissivity measurement principle and method, total heat flow measurement principle and method.