1)d.c. voltmeter,直流电压表2)AC/DC voltmeter,交直流电压表3)Digital direct current voltage meter,数字直流电压表4)Four and a half bits digital current voltmeter,4位半数字直流电压表5)DC/DC,直流-直流6)DC/DC,直流直流
用法和例句
This paper presented the development of display meter and the advantages of digital meter and gave the design dates of AC/DC voltmeter,AC/DC current meter and AC power meter.