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 <title><![CDATA[发送定周期方波]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96659.html]]></link>
 <description><![CDATA[Latest 50 replies of 发送定周期方波]]></description>
 <copyright><![CDATA[Copyright(C) 工控人家园]]></copyright>
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 <title><![CDATA[]]></title>
 <description><![CDATA[你啥意思啊？干什么用]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96659#978263.html]]></link>
 <author><![CDATA[kingfeng1983]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Fri, 25 Feb 2011 00:46:47 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[那可不可以没隔多少时间让这个数据改变一次电平，利用计时器，这个应该行吧？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96659#977036.html]]></link>
 <author><![CDATA[lucaslu]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 23 Feb 2011 09:02:50 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[这个好像不行吧，既然是通讯了，你在让它方波]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96659#977024.html]]></link>
 <author><![CDATA[hxl202319]]></author>
 <category><![CDATA[西门子工控论坛]]></category>
 <pubdate><![CDATA[Wed, 23 Feb 2011 08:48:09 +0000]]></pubdate>
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