They may, however, make information in the HEAD available to users through other mechanisms.

然而，他们可以采用其他的机制将这些HEAD元素内的信息提供给用户。

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For treatment plants which have additional upstream hydraulic head available, the operating water level can be raised and the shaft bearings can then be mounted directly to the top of the tank walls.

这促使轴，对于具有额外的上游水力头的污水处理厂，可以提高运行污水水平，然后直接将轴轴承提高到池壁顶端。

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With sequential access, the disk head can move directly to the next available track on the disk.

使用顺序访问，磁盘头可以直接移动到磁盘的下一个可用磁道。

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Italian Prime Minister Mario Monti says he is not siding for now with any party in upcoming elections, but remains available to head a future government.

BBC: Mario Monti 'available to lead Italy'

"We're delighted Deacon Manu has finally put his hand up for Fiji, look around there's no better tight-head prop than him available to represent Fiji, " said Fiji selector Mosese Taga after picking the prop in his squad.

BBC: Prop Manu commits future to Fiji

Additionally, the system creates a sort of targeting reticule that appears over nearby cars, letting you know when you're perhaps driving a little too close. (That, of course, is when you have to switch from missiles to guns.) The head unit recently became available in Japan, and while there's no word on a release date or price in the US, hopefully it won't be long off.

ENGADGET: Pioneer Carrozzeria AR heads-up display hands-on (video)