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 <description><![CDATA[Latest 50 replies of S7-200与17台MM440变频器通讯速度怎么样？]]></description>
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 <description><![CDATA[我准备用USS通讯的 还有什么专用模块吗？ 有什么好处吗？]]></description>
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 <pubdate><![CDATA[Mon, 01 Feb 2010 23:30:47 +0000]]></pubdate>
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 <description><![CDATA[关健是用什么方法去进行通讯,用专用通讯模块比较快一点]]></description>
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 <pubdate><![CDATA[Mon, 01 Feb 2010 12:56:34 +0000]]></pubdate>
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