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gongxx163
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樓主  發(fā)表于: 2012-01-01 19:51
當設計一個(gè)儀表電路圖時(shí)什么情況下4-20ma的回路比0-20ma的回路更合適？？？
yzc110
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1樓  發(fā)表于: 2012-01-01 20:07
最好用工業(yè)標準（4-20MA)

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