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。
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