mobile drill rig

例句：

1. 1. Themobile drill rig was used to drillholes in the rock.
   移动式钻机被用来在岩石中钻孔。
2. 2. The engineers were busy setting up the mobile drillrig for the construction site.
   工程师们忙于为工地设置移动式钻机。
3. 3.The mobile drill rig was a criticalcomponent of the project's success.
   移动式钻机是该项目成功的关键因素。