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在检测器桥路中，接有可调电位器。
A continuously variable potentiometer is connected into the detector bridge network.
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调节电位器，便可调节电动机的转速。
Regulate the potentiometer, the then adjustable electric motorrev.
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调节电位器，便可调节电动机的转速。
Regulate the potentiometer, the then adjustable electric motorrev.
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