a surface roughness measuring instrument
a surface roughness measuring instrument
表面粗糙度测量仪器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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This paper is concerned with the principle of a non - contact optical instrument for measuring the surface roughness of a magnetic disk with an opto-heterodyne interferometer.
根据外差干涉计量术的原理，研制了非接触式的光外差干涉磁盘表面粗糙度测量仪。
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