他们用电桥来测量传感器的阻抗。
They use a bridge to measure the impedance of the transducer.
本文分析了用电阻箱作桥臂电阻自组电桥的灵敏度及测量结果不确定度，给出桥臂电阻的选择原则。
The sensitivity of the self-organized bridge using resistance box as arm resistance and the uncertainty of the measuring result are analysed. The selecting principles are given.
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