例如纽约地铁(如下图)的带防护罩的上触式系统，总之需要放射状放置集电靴来使它们在盖下适合。
Top contact systems with protective covers over them, like the New York Subway (photo left), needed radially mounted shoes anyway to allow them to fit under the cover.
介绍了用于角膜放射状切开手术的准分子激光器和光束投射系统。
This paper describes an excimer laser and its beam delivery system for corneal radial keratotomy.
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