一、何谓倒打上旋球单手握槌柄,使槌头轴线垂直于地面,让槌头下端在距自球顶端约1～3厘米处,轻轻落下,在槌头端面接触球的同时快速向后拉动,摩擦自球,靠球的旋转向拉动方向滚动。这里要注意:与槌头端面接触球的同时,快速向后拉动,在0.1秒以下的时间完成动作,既不造成连击,也不 First, what is the one-handed hammer grip on the rotary ball, so that the hammerhead axis perpendicular to the ground, so that the lower end of the hammerhead from the top of the ball about 1 to 3 cm, gently fall, the ball in the ball at the end of the face of the ball Pull back, friction from the ball, by the rotation of the ball to pull the direction of rolling. Here to note: the ball with the ball at the head end of the face at the same time, quickly pull back in less than 0.1 seconds to complete the action, neither to cause batter, nor