combined pocket volt ammeter 组合袖珍伏安计
Volt-Ammeter 电压电流表
VA volt ammeter 伏安表
volt-ohm-ammeter 伏欧安计
volt-and-ammeter 伏安表
N a dual-purpose instrument that can measure both potential difference and electric current, usually in volts and amperes respectively 伏特安培表
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