... pivoted jib crane 旋转式悬臂吊车 pivoted lever 回转杆 pivoted pad 绕枢轴转动的推力块 ...
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pivoted lever arm 枢杆臂
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A heavy forge hammer having a pivoted lever by which it is tilted up and then allowed to drop.
锻造用的重锤，通过带枢轴的杠杆将它倾斜抬起，然后落下。
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