1.
optical transmission density
光学透射密度，即光学玻璃或器材的透光程度，是不透明度的对数
2.
Geometric conditions for measuring transmission density
GB/T11500-1989摄影透射密度测量的几何条件
3.
ionizing radiation transmission density meter
电离辐射透过式密度计
4.
scanning transmission microdensitometer
扫描透射显微密度计
5.
gamma-ray penetration type liquid density meter
γ射线穿透式液体密度计
6.
Fabrication of high-aspect-ratio and high-density X-ray transmission grating
大高宽比、高线密度X射线透射光栅的制作
7.
Influence of the Multipole Effects to the Opacity of Hot and Dense Plasmas;
高温稠密等离子体辐射不透明度的多极效应
8.
density meter(of ionizing radiation)
（电离辐射）密度计
9.
ionizing radiation transmission thickness meter
电离辐射透过式厚度计
10.
modulated beam microdensitometer
调制射束显微密度计
11.
Density meters utilizing ionizing radiation
GB/T13980-1992电离辐射密度计
12.
radioactive sediment density probe
放射性沉积物密度探针
13.
scanning reflective microdensitometer
扫描反射显微光密度计
14.
radioisotope densimeter
放射性同位素密度计
15.
The density logger consists of a radiation source.
密度测井仪包括辐射源。
16.
Thickness of consistency;impenetrability.
致密度一致的程度，不可穿透性
17.
ionizing radiation backscatter soil density meter
电离辐射反散射土壤密度计
18.
diffuse transmittance
漫射透光率,漫射透射比