Besides, the guide head unit having crosswise grooves can be used in welding circular pipes.

此外，具有多个横向槽的导向头单元可用于对实际上为圆形的管子进行焊接。

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If you own a newer vehicle, like the ones shown here, chances are that the head unit is not easily replaced due to cosmetic or functional concerns.

如果你有一辆新车，如图所示，要更换汽车音响机头单元的话会有点困难，因为要考虑到美观和性能因素。

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Studying the theory of optical pickup head unit (OPU) and how to pickup the signal on the disk. Based on these theories, it analyse the structure of the focusing and tracking device.

研究光学拾取头的基本原理和光盘信号拾取原理，简要分析了实际的光学头聚焦伺服和循迹伺服的机械结构。

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The head of the International Red Cross Federation's Tsunami unit, Al Panico,says his agency received nearly $3 billion, from the general public.

VOA: standard.2009.12.26

Lead surgeon Dr.Antonio Alcaraz is head of the Barcelona hospital's Renal Unit.

VOA: standard.2010.05.30

Though products were initially expected from several manufacturers, Clarion ended up being the only one to actually produce a head unit.

ENGADGET: Bill Gates: top ten greatest hits (and misses) - the Microsoft years

But, more photogenic is the rendition that's created on the slide-out display of the head unit itself, which you can see in the video after the break.

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

If you're thinking of making an upgrade to your current head unit, have a closer look at the gallery below or check the press release after the break.

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