power crane

例句：

1. 1. The construction site needed a powerfulcrane to move the heavy equipment.
   施工现场需要一台强大的起重机来移动重型设备。
2. 2.The engineer used a power crane tolift the heavy steel beams.
   工程师使用一台动力起重机来抬起沉重的钢梁。
3. 3.The power crane was essential for theconstruction of the new bridge.
   动力起重机对于新桥梁的建设至关重要。