A machine for hoisting and moving heavy objects by means of cables attached to a movable boom.
起重机：一种用连在活动架上的缆绳举起和移动重物的机器
A machine for hoist ing and moving heavy objects by means of cables attached to a movable boom.
起重机：一种用连在活动架上的缆绳举起和移动重物的机器。
A machine for hoist ing 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
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
A study on the test of the inclined boom with waist cables
腰绳式斜河绠的试验研究