本文介绍了用PTC8253-5实现机加零件自动包装计数定时的设计，给出了硬件电路和软件程序。

This paper introduces the design of counting and timing device for automated machine-made spares packing with PTC8253-5. The hardware circuit and software are given.

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壳牌销售加氮汽油，以保持发动机零件干净。

Shell USES nitrogen enriched gasoline to help keep engine parts clean.

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欧加南墨机器的原理和一些企业界用来制造零件及机械运转模型的快速原型机类似。

Organovo's 3d bio-printer works in a similar way to some rapid-prototyping machines used in industry to make parts and mechanically functioning models.

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