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电子管电压表
avia. electronic voltmeter
el.mach. vomax
met. electron tube voltmeter; tube voltameter; valve voltmeter
tech. tube voltmeter; vacuum-tube voltmeter
电子管电压表伏特计
auto. valve voltmeter
电子管电压表〔伏特计〕
gen. vomax
电子管电压表: 3 phrases in 2 subjects
Construction1
Technology2