平衡器利用可调节弹簧拉力去抵消其吊坠工具的重力，从而大大减轻劳动强度，保证了安全，提高了工作效率和工具的使用年限。

The balancer uses the adjustable spring tension to counteract the gravity of the pendant tool, thereby greatly reducing the labor intensity, ensuring the safety, improving the work efficiency and the service life of the tool.