The mechanical spectral scanning instrument belongs to the traditional technique, whose precision and speed are relatively slow;
机械扫描式分光光度测色仪属传统方法，精度虽高但速度慢；
Mechanical processing industry: used for precision instrument manufacturing cutting in line, high precision cutting.
机械加工业：用于精密仪器制造切割对线，实现高精度切割。
The requirements of coherence, mechanical stability of instrument and precision of optical device in interferometric methods are strict.
干涉的方法对光源相干性、设备的机械稳定性及光学器件的精度要求很高。
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