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 <title><![CDATA[寻求S7-200帮助！！！]]></title>
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 <description><![CDATA[对的，一个pid控制一个，一个plc最多能有8个回路控制，书上有！]]></description>
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 <author><![CDATA[beiye1234]]></author>
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 <pubdate><![CDATA[Fri, 05 Feb 2010 07:43:15 +0000]]></pubdate>
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