balance lifting beam天平
balance e beam平衡木
balance e beam engine pump发动机平衡杆泵
Non-automatic balance - Beam balance非自动天平
Balance Beam Score平衡木评分法
Balance beam spherule平衡木小球
Balance beam pumping unit游梁式抽油机
woman balance beam女子平衡木
balance beam system平衡梁系统
同义词：beam