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1.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收藏指正
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