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 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.
栋木一块整齐的木料，尤指房屋结构中的横梁 A dressed piece of wood, especially a beam in a structure.
柱，杆建筑物框架中横梁的支撑物 A support for a beam in the framework of a building.
