该系统包括用来提供流过样品的电流的6220型电流源和用来测量产生的电压降的2182A型纳伏表。
The system includes a Model 6220 Current Source to supply the current through the sample and a Model 2182A Nanovoltmeter to measure the resulting voltage drop.
所需的容量应该仔细计算，还有经过从系统馈送到起重机或台车运行长度的终点那段距离后的电压降也要仔细计算。
The required capacity should be carefully calculated, as well as the voltage drop over the distance from the point where the system is fed to the end of the crane or trolley travelling length.
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