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 <title><![CDATA[西门子300的PI ， PQ是什么意思]]></title>
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 <description><![CDATA[Latest 50 replies of 西门子300的PI ， PQ是什么意思]]></description>
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 <description><![CDATA[谢谢了啊]]></description>
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 <author><![CDATA[随便聊1]]></author>
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 <pubdate><![CDATA[Mon, 15 Nov 2010 23:28:47 +0000]]></pubdate>
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 <description><![CDATA[PI,PQ是指外部设备输入、输出口，和物理设备直接相连的映像区。不同于过程映像区，PI PQ是实时更新的。]]></description>
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 <author><![CDATA[yangxiaoping]]></author>
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 <pubdate><![CDATA[Mon, 15 Nov 2010 14:25:45 +0000]]></pubdate>
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 <pubdate><![CDATA[Mon, 15 Nov 2010 13:37:04 +0000]]></pubdate>
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