| 释义 |
〔derrick〕A machine for hoisting and moving heavy objects, consisting of a movable boom equipped with cables and pulleys and connected to the base of an upright stationary beam.悬臂起重机：提升和移动重物的机器，它由一个带有缆绳和滑轮的可移动的、并与一根由向上静止横梁的底座连接的起重杆组成〔swipe〕A lever, especially one that raises the bucket in a well.起重杆：杆，尤指提起井中提水桶的起重杆 |