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先飛鳥(niǎo)
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樓主  發(fā)表于: 2017-03-06 13:27
發(fā)一個(gè)世界各國用電標準的資料，里面有大部分國家普通用電的電壓和頻率規格，還有少部分國家的三相工業(yè)電的標準，適合大部分做外貿設備的朋友
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chen1354
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1樓  發(fā)表于: 2017-03-25 16:26
下載學(xué)習，謝謝。

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