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美女小韩老师教乒乓球勾手发球握拍手指细节大拇指压实虎口偏食指
美女小韩老师教乒乓球勾手发球握拍手指细节说法，大拇指压实，手腕回勾、虎口偏食指，后三指握紧@小韩乒乓个体店小韩
勾手发球技术，包括握拍方法，引拍动作要领，击球动作等15/37
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