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小韩老师教乒乓球勾手发侧上旋球摩擦技巧引拍低手腕向上带摩擦
美女小韩老师教乒乓球勾手发侧上旋球摩擦技巧，引拍向后低一点，右后向前上方挥拍，触球手指手腕向上带摩擦。@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13/37
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