What would you put the outer radius at?

你估计外半径有多大？

Through the model well test of acoustic log, the paper discussed the affect of outer radius of model well on acoustic waveform.

本文通过声波测井模型井实验，讨论了模型井外径对声波波形的影响。

In order to analyze the effect of pipeline thickness on ECT sensor, radius-electrode ratio is defined as the ratio of inner radius and outer radius.

为了分析管道厚度对电容传感器的作用，定义了径极比（传感器管道内径与外径之比）的概念。

The shrinkage bubble dynamics model can gain the relations of the bubble internal pressure, the outer radius of the hydrate and the bubble radius with the time during the whole reaction time.

缩泡动力学模型能得到整个反应时间内的气泡内压、水合物外层半径和气泡半径与时间的关系。

To solve the differential equations, we divide the sphere into two parts: inner part - a sphere with small radius and outer part - a spherical shell.

在微分方程求解过程中，把整个球体分成两部分：内部是球心附近的一个小球，外部为一球壳。