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通过对Se75特性的分析和试验 ,得出了Se75的主要参数 :平均能量、透照厚度、半值层及透照曝光量经验公式。
Through the analysis of Se75 characteristics and experiments, the main parameters of Se75 are obtained: average energy, transillumination thickness, half-value layer and empirical formula of transillumination exposure.