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
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
