mobile sand loader

例句：

1. 1. The mobile sand loader is used to transport sand and gravel from the construction site.
   移动式沙石装载机用于从建筑工地运输沙子和砾石。
2. 2.The engineers have developed a new model of mobile sand loader that can handle larger loads more efficiently.
   工程师们开发了一种新型的移动式沙石装载机，可以更有效地处理更大的负载。
3. 3.The mobile sand loader was used to level the ground before the construction began.
   在施工开始之前，移动式沙石装载机被用来平整土地。