名词
中文翻译：提升杆
同义词：
['elevator rod', 'lifting arm', 'lifting lever']
例句：
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1. The elevatorrod is the only thing that can lift the heavy box.
电梯杆是唯一能举起重箱子的东西。
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2. The lifting arm was designed to help workers lift heavy objects.
升降臂被设计来帮助工人举起重物。
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3.The lifting lever is used to lift heavy objects without bending the worker's back.
升降杠杆被用来举起重物，而不弯曲工人的背部。