swinging pillar jib crane

例句：

1. 1.The swinging pillar jib crane was a marvel of engineering.
   摇摆的柱子起重机是工程学的奇迹。
2. 2. The construction crew used the swinging pillar jib crane to lift heavy loads.
   施工队伍使用摇摆的柱子起重机来举起重物。
3. 3.The swinging pillar jib crane was essential for the successful completion of the project.
   摇摆的柱子起重机对于项目的成功完成至关重要。