beam attenuation 束衰减

broad beam attenuation 宽束的衰减 ; 宽束衰减

beam attenuation coefficient 光束衰减系数

narrow-beam attenuation 窄束衰减 ; 窄束减弱 ; 细衰减

attenuation broad-beam 宽束衰减

beam attenuation grid 射束衰减网格

primary beam attenuation 主束衰减

neutron beam attenuation 中子束衰减

broad d beam attenuation 宽束的衰减