Several of commonly used methods are photoprinting, photoengraving, mechanical engraving, and stencil.

通常所采用的几种储存方法是：影印法、照相蚀刻、 机械雕刻和模板。

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I enjoy the mechanical and technical aspects of hand engraving, from building engraving tools to the feel of a graver effortlessly moving in my hand through the metal, creating a clean cut.

我喜欢手工雕刻，在机械和技术方面，去开发出新的雕刻工具可以让我用双手轻松将金属，创造出一个精致干净的切割面。

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Also not qualifying as conservation is restoration where mechanical repairs are made such as filling holes, smoothing out scratches, and re-engraving of detail.

另外，钱币修补也不等同于钱币保养，其使用填补空洞、磨平划痕、重刻图案细节等机械性修补。

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