... double-magnification imaging 双放大倍率成象法 double pan balance 双盘天平 double-pass internal reflection element 双通内反射元件 ...
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double pan balance scales 双泛平衡表 ; 双重盘天平
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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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