多数情况下，安培计或皮安计是用于测量电流的。
In most cases, an ammeter or picoammeter is used to measure current.
由于静电计、安培计或皮安计的输入端压降小于1mV，这两个二极管不会导通。
Since the voltage burden of the electrometer ammeter or picoammeter is less than 1mV, the diodes won't conduct.
由于静电计、安培计或皮安计的输入端压降小于1mV，这两个二极管不会导通。
Since the voltage burden of the electrometer ammeter or picoammeter is less than 1mV, the diodes won't conduct.
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