有效衰减系数 effective attenuation coefficient; effective attenuation factor 雨致衰减系数 rain attenuation coefficient .
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Single wavelength collimation transmittance experiment is designed and conducted, with total effective attenuation coefficient of tissue phantoms being obtained.
设计单波长准直光透射实验并通过实验测量组织模拟样品的总衰减系数；
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