Surface roughness measurement has always been an important research subject in many engineering fields.
在许多工程领域中，表面粗糙度测量一直是一个重要的研究课题。
The invention belongs to the fields of surface technology and material preparation.
该发明属于表面技术、材料制备领域。
The invention belongs to the fields of surface technology and material preparation.
该发明属于表面技术、材料制备领域。
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