Here's the core diameter, it's about three and a half meters.

这是核心的内径，这是大约3米半。

An optical fiber evanescent wave methane gas sensor based on core diameter mismatch is reported.

提出一种基于纤芯失配的光纤倏逝波甲烷传感器。

Moreover, investigated the relation among the P wave velocity, the micro-crack in rock with the variation of core diameter.

探讨了岩石的微观裂隙、超声波速度与岩芯变形之间的关系。

The PCF region and core diameter given are the average of three measurements along each axis, and the ellipticity is the ratio of the maximum to the minimum measurement.

有关地域的中心，给出了均匀直径三轴，沿着每个尺寸的椭圆率是最大的比例最小计量。

By means of intermediate image immersing technology, the present invention has increased reflection Angle, reduced straight collimator core diameter and shortened straight collimator length.

本发明是借助中间像浸没的技术，增大反射角、减小直光管芯径，缩短直光管的长度。