Derrick
01
起重机, 钻塔
a type of lifting apparatus consisting of a vertical mast and a boom, typically used in construction or oil drilling operations
例子
The construction crew assembled the derrick to lift heavy materials to the upper floors of the building.
施工队组装了井架，将重型材料吊到建筑物的上层。
In the oil field, workers erected a massive derrick to support the drilling rig during extraction operations.
在油田，工人们竖起了一个巨大的井架来支撑钻探设备进行开采作业。
02
井架, 带有从吊杆悬挂的起重滑车的简单起重机
a simple crane having lifting tackle slung from a boom
