这种铅笔芯制造法沿用至今。

This method of manufacture remains the one in use today.

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这种加工工艺叫作加层制造法，其工作原理有些类似三维打印机。

The process is called Additive Layer Manufacturing, and it works somewhat like a 3-D printer.

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静电吸附式快速成型制造法是一种新的快速成型方法。

A method of rapid prototyping manufacturing using electrostatic attraction is a new rapid prototyping method.

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