derrick
n
1 large crane for moving or lifting heavy weights, esp on a ship 转臂起重机; (尤指轮船上的)桅杆起重机.
2 framework over an oil well or borehole, to hold the drilling machinery, etc 井架; 钻塔. Cf 参看 oil rig (oil).
Who could have imagined, in the mid 1970s, for example, that by the end of the 20th century, computers would be as common in people's homes as TV sets?