1. equal-arm balance：equal spiral angle taper cylindrical milling cutter 等螺旋角锥度柱铣刀 | equal-arm balance 等臂天平 | equal-force trainer 等力训练器
1. 等臂天平
1. 不用等臂天平，而是用长短臂天平。
Instead of using an equal-armed scale, one with a short arm and a long arm was used.
2. 优化设计和制造出并联天平样机，设计了天平的全等臂惠斯通电桥，并依据分压原理，给出电桥的输出电压。
The output voltage of the bridge was given according to the voltage division principle.
3. 等臂天平
3. 优化设计和制造出并联天平样机，设计了天平的全等臂惠斯通电桥，并依据分压原理，给出电桥的输出电压。
A optimal prototype of parallel balance is fabricated in the paper, whose wheatstone bridge of equal arm was designed. The output voltage of the bridge was given according to the voltage division principle.