The print unit can be added to the product according to the users need.

产品可按用户需求添置打印装置。

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A PDF file, which is a 1 to 1 translation of the print unit to a digital unit, as I explained, still has fixed pages and page Numbers.

地从印刷单元转换到数字单元的PD F文件，就像我上边解释的，仍然保有固定的书页和页码。

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And they can print objects in multiple materials, such as a plastic remote-control unit with rubbery buttons.

他们还能制造多材料的物件，如有橡胶按钮的塑料遥控器。

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Even though they can print one book at a time, it can be expensive per unit, more expensive than hard copy printers.

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He displays sheets with details of every man in his unit, including names of family members, the number of each kind of weapon, and a thumb print.

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