... beam balance ratio 光速平衡比 double beam balance 双梁天平 four beam balance 四梁天平 ...
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This type of equal arm balance with double beam and pan adopts flexible steel band as support without abrasion to the edges of the knife.
复梁式双盘等臂天平，采用钢带弹性作支撑，无刀口磨损现象发生。
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