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Uploaded by 04010917 on Apr 5, 2010
蔡正億 台北體院運動競技學士專攻游泳踢6下換邊,換邊須側轉肩才不會卡住。屈肘抓水,轉肩划水,揮臂推水。自由式、仰式以轉身的力量帶動肩膀划水,才能省力游得久。
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