https://bgk-photo.cdn.bcebos.com/342ac65c103853435fa01c408313b07eca808860.jpg假设X射线源用铝材屏蔽，如果要使95%勺X射线能量不能穿透它，试 决定铝材的最小厚度。设线性吸收系数为。https://bgk-photo.cdn.bcebos.com/0df431adcbef7609fd6402fe3edda3cc7cd99e60.jpg________0.42=7.13(cm)
https://bgk-photo.cdn.bcebos.com/342ac65c103853435fa01c408313b07eca808860.jpg假设X射线源用铝材屏蔽，如果要使95%勺X射线能量不能穿透它，试 决定铝材的最小厚度。设线性吸收系数为。https://bgk-photo.cdn.bcebos.com/0df431adcbef7609fd6402fe3edda3cc7cd99e60.jpg________0.42=7.13(cm)
发布时间：2025-06-22 15:35:22
