The invention relates to an improvement method of a core rod of a metal rolled tube, in particular to a hollow core rod used for a planetary rolling mill.
本发明涉及一种金属轧制管的芯棒改进方法，具体地说是一种行星轧机用空芯棒。
The paper presents a method of geometric measurement of hollow-core optical fiber using the image processing techniques.
本文提出了采用图像处理方式进行空芯光纤几何参数测量的方法。
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