balancing rig

例句：

1. 1. The engineer carefully balanced the heavy load on the crane.
   工程师小心翼翼地在起重机上平衡了重物。
2. 2. The construction crew was using a balanced crane to move the large pieces of equipment.
   建筑工人正在使用一台平衡起重机来移动大型设备。
3. 3.The balancer is designed to keep the load stable and prevent it from tipping over.
   平衡器设计用来保持负载稳定，防止其翻倒。