換被套，變簡單了

換被套很麻煩，學會後，你就天下無敵了

http://www.seeagainla.com/video/1832/%E6%A3%89%E8%A2%AB%E6%8B%BF%E5%87%BA%E4%BE%86%E6%8F%9B%E8%A2%AB%E5%96%AE%E5%BE%88%E9%BA%BB%E7%85%A9%EF%BC%8C%E5%AD%B8%E6%9C%83%E4%B9%8B%E5%BE%8C%E4%BD%A0%E5%B0%B1%E5%A4%A9%E4%B8%8B%E7%84%A1%E6%95%B5%E4%BA%86/