sleeper handling crane

例句：

1. 1. The engineers are busy installing the new sleeper handling crane at the construction site.
   工程师们正在工地忙碌地安装新的装载式起重机。
2. 2. The sleeper handling crane is capable of lifting heavy loads with ease.
   这种装载式起重机可以轻松地举起重物。
3. 3. The engineers have successfully tested the sleeper handling crane's performance in various conditions.
   工程师们已经成功地测试了这种装载式起重机在不同条件下的性能。