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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; 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
: 行程开关 反力系统+触点系统
: 万能转换开关 触点系统
; 卡
:
== 理论 ==
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