Difference between revisions of "怎样考取低压电工证理论篇"
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怎样考取低压电工证理论篇
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: 电磁式 仪表由固定的  线圈,可转动的<u>铁芯</u>及转轴、游丝、指针、机械调零机构等组成.可直接用于交、直流测量,且精确度高.
: 磁电式 仪表由固定的<u>永久磁铁</u>,可转动的<u>线圈</u>及转轴、游丝、指针、机械调零机构等组成.
; 实质
: 万用表实质是一个带有整流器的磁电式仪表.万用表由表头、测量电路及转换开关三个主要部分组成.滚轮卡棘轮
; Ω
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