辐射能密度谱 spectral radiant energy density

初级辐射能密度 [地物] energy density of primary radiation

辐射能量密度 radiant flux density ; radiant energy density

辐射能通量密度均匀性 radiant energy flux density uniformity

辐射能通量密度 radiant energy flux density

双能X射线骨密度检查 dual-energy X-ray bone density screening

双能X射线骨密度仪 dual energy X-ray absorptiometry