One suitable definition of significant figure is introduced and the reasonable data treatment result in measuring resistance with voltmeter-ammeter method is obtained.
本文介绍了一种较具适用性的有效数字的定义，并给出了伏安法测电阻时数据处理的合理结果。
Ammeter, voltmeter, bridge and similar common methods are typical equipment types.
电流表、电压表、电桥以及类似的常见仪器都属于常用的设备。
When an unknown signal is connected to a measuring device, such as a voltmeter or ammeter, the measurement accuracy is almost entirely determined by the measuring device.
当一个未知的信号被连接到测量装置时，例如伏特计或安培表，测量准确度则几乎完全由测量装置决定。
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