As the mouse ball in the bottom of the mouse rolls over the mouse Dad. it presses against and turns two shafts.

 
  • 當鼠標底部的鼠標球開(kāi)始旋轉的時(shí)候.;有兩個(gè)軸將會(huì )受到擠壓并發(fā)生旋轉
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