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it still using it for focusing laser beam by adjusting laser diode up and down when sometime cd or dvd got unstable spinning,this video show how its workhttps://www.youtube.com/watch?v=fLfUEmDTKVQ
it using it for focusing by adjusting laser diode lens up and down.this video show how its workhttps://www.youtube.com/watch?v=fLfUEmDTKVQ
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