| 摘要 |
<p>The putting practice aid comprises at least one radiation (light or infrared) source arranged to produce a pair of parallel beams, the spacing between the beams being such as to accommodate a putter club head swung along a centre line between the beams; a sensor arranged to sense radiation passing along the or each beam; and an alarm arranged to initiate an identifiable warning signal when a sensor senses that a respective beam has been interrupted.</p> |
