特性衰变率
characteristic rate of decay
涂钍灯丝
thoriated filament
涂钍钨丝极
thoriated emitter; thoriated tungsten filament
涂钍阴极
thoriated cathode
钍
thorium
Th; thorium
钍D
D thorium
钍TH
thorium
钍X
X thorium
钍后元素
transthorium element
钍矿
thorite
钍射气
thoron
thoron
thorium emanation; thoron
钍试剂
thorin
钍铈混合造影剂
actinophor
钍系元素
thorides
钍照片
thoriagram
梯级衰减器
stepped attenuator
梯形衰减器
ladder attenuator
跳越衰落
skip fading
听性神经衰弱
acoustic neurasthenia
图像衰减
image attenuation