"The water in a low-lying section of the southern Third Ring Road is knee-deep," said a Beijing resident surnamed Wang.
“三环地势低的地方水都已经没膝盖了，”北京的王女士说。
Aiming at the deep hole detection, the method of ring light section is introduced and its principle is analyzed.
针对深孔内膛的检测，对环形光切的测量方法进行了介绍，对其测量原理进行了分析。
An image detection method based on the ring light section method was developed to measure deep holes with complex surfaces, especially rifled gun barrels.
针对膛线炮身管提出了一种基于环形光切的图像检测方法。
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