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 (view source)

Revision as of 16:57, 15 August 2024

51 bytes added ,  15 August
→‎辨异
: 工频电流：工业用电频率的电流，一般 50Hz
: 高频电流：远高于高频电流，一般几百 kHz 至 MHz
 
; 距离
: 10kV 以下，安全距离为 0.35 米
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