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Quay tr? l?i v? trí c? c?a b?n trong t? th? plank cao, sau ?ó l?p l?i ??ng tác ch?ng ??y. M?t s? tr??ng h?p vú x? g?n ch?m t?i r?n khi?n ch? em g?p nhi?u r?c r?i c? v? m?t th?m m? l?n s?c kh?e. Theo ?ó, m?i ng??i có th? nh?n bi?t vú x? th&o