The difference, again, between the iPad and a MacBook is that one is a multi-purpose device and the other is a media player.

iPad与Macbook之间的区别就是，一个是多功能设备，而另一个只是媒体播放器而已。

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This paper introduces a multi-purpose unloading buffer device that is commonly used with the type SSJ1400/4X400 belt conveyor for use in tailgates.

介绍了一种常用于SSJ1400/4×400型巷道带式输送机的多用途卸料缓冲装置，此装置既能解决挡煤板前的积煤问题，又增加了挡煤板的推拉功能。

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Because the tool bit and the tool bar are is fixed together by the tapering shape positioning device, the tool bit can be dismounted from the tool bar to make a multi-purpose tool bar.

由于刀头和刀杆是用锥式定位装置固定在一起的，所以刀头可以从刀杆上拆卸下来，使得一刀杆多用。

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But even then, not all iPod touch users necessarily use the multi-purpose device to play games.

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Nowhere has the debate between specialized device versus multi-purpose device been clearer than in the e-book market.

FORBES: Specialized Vs. Multi-Purpose Mobile Tech Devices

Mobile-phone manufacturers have been busy preparing for this development for years, mating mobiles with two other mobile machines personal organisers and personal computers to create a multi-purpose device that nobody can afford to be without.

ECONOMIST: A Survey of Telecommunications: The world in your pocket | The