二、钩球球在直线接近球瓶时,其线路呈一弯曲的钩形球路。因球在直进的纵回转中会有横回转,所以对球瓶有很强的冲击力。如果掌握得法,全倒的机会就会很大。钩球的役球要点:送球的时候,大拇指在内侧,像要握手一般来放球。首先在拇指先拔出,然后是中指与无名指拔出,而且同时扭转手臂和手 Second, the hook ball In the straight line close to the bottle, the line was a curved hook ball. Due to the ball in the vertical rotation will have horizontal rotation, so the bottle has a strong impact. If you master the law, the chance of a full down will be great. Hockey service ball points: when the ball is sent, the thumb on the inside, like to shake hands in general to put the ball. First pull out the thumb first, then pull out the middle finger and ring finger, but at the same time reverse the arms and hands