起重机臂 meaning in Chinese

cathead
crane boom
crane jib
gib arm
gibbet
lever of crane
outreach

Raise and lower the crane arm and then use the winch to lift construction materials and other loads
提高，并降低起重机臂，然后用绞车吊起建筑材料及其他负载。
With the proposed method , the optimal design of crane booms made of high strength alloy tubes used for drilling platform is carried out in order to obtain the lightest crane booms
对采用高强度钢管研制的某海洋钻井平台起重机臂架进行优化设计，获得了最轻自重起重机臂架的最佳设计方案。
Taking thickness of web members and main chords as design variables and the lightest weight of crane booms as objective junction , considering constraints of rigidity and stability etc . , this paper establishes the math model of optimal design
摘要选取起重机臂架的腹杆壁厚和各节臂架的主弦杆壁厚为设计变量，以最小重量为优化目标，考虑刚度和稳定性等约束条件，建立优化数学模型。