According to the horizontal moving rule of bridge crane and the swing rule of grab, We propose a method about swing proof of grab.
根据桥式起重机水平运行规律及抓斗摆动规律，提出了抓斗防摆的一种方法。
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The crane can rotate 360 degrees, which means it can move forward, left, right, after all more than 10 meters to grab and rotary lifting objects, without the aid of other auxiliary equipment.