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balance arm
agric. 天平臂{显技}
archit. 称杆; 天平磅
dril. 摇臂
met. 平衡臂; 均衡梁; 天平臂; 秤杆
tech. 摆梁; 平衡式窗扇托臂; 平衡杆
balance arm: 7 phrases in 2 subjects
Gymnastics3
Technology4