Precision machining, as a manufacturing technique of micro - optical components, has many advantages which are difficult or even impossible for other traditional methods.

超精密机械加工技术作为微光学元件的一种制造方法，具有很多其他传统方法所不具有的优点。

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The traditional machining methods are not only low productivity, but also low precision.

传统的加工工艺和手段，生产率低、精度差。

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On ultra precision cutting, grinding and non-traditional machining, there is a hard problem between long travel and high precision, especially in multi-coordinate machining.

在超精密切削、磨削、特种加工中，大行程驱动与高精度进给是难以解决的矛盾，也是多坐标超精密加工的难点。

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