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yxc111
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樓主  發(fā)表于: 2010-10-08 16:50
問(wèn)下各位高手 變頻，伺服放大器，這里面提到的開(kāi)環(huán) 閉環(huán) 是什么意思啊
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1樓  發(fā)表于: 2010-10-09 12:36
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