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 <title><![CDATA[指令有什么区别?]]></title>
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 <description><![CDATA[Latest 50 replies of 指令有什么区别?]]></description>
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 <description><![CDATA[X20&nbsp;&nbsp;只要通了每个扫描周期都会通的 
X21 只有接通的那个扫描周期会通]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#517718.html]]></link>
 <author><![CDATA[yangjiyao]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 13 May 2009 08:18:31 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[呜呼， 说明书有上升沿和下降沿的使用，有空看书吧 [s:33]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#517095.html]]></link>
 <author><![CDATA[luo76]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 12 May 2009 12:59:02 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[多看看手册]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#515769.html]]></link>
 <author><![CDATA[lidonghu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 11 May 2009 06:37:53 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[20为按钮型的常开点按下去不动一直保持ON，21意思是按下去不动只接通一小会，明白]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#493974.html]]></link>
 <author><![CDATA[huxupin]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 18 Apr 2009 12:41:14 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[呵呵，虚心学习共同提高！！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#432534.html]]></link>
 <author><![CDATA[zhangshichao]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 14 Feb 2009 02:34:31 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[学习了，不错哦，多研究吧。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#389505.html]]></link>
 <author><![CDATA[yangqhgkrjy]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 17 Dec 2008 13:55:34 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[多看看手册，搞什么嘛！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#389496.html]]></link>
 <author><![CDATA[竹风凉]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 17 Dec 2008 13:50:33 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[学习一下]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#387133.html]]></link>
 <author><![CDATA[jiyouwang]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 15 Dec 2008 15:22:06 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[完全正确，OK]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#380840.html]]></link>
 <author><![CDATA[ljc2008]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 10 Dec 2008 01:51:52 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[前一个是一直接通
后面的是扫描上半周期接通!!]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#380835.html]]></link>
 <author><![CDATA[guojin2008]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 10 Dec 2008 01:48:11 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[你打LDP就可以了,&nbsp;&nbsp; 箭头朝下的话就打LDF]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#380760.html]]></link>
 <author><![CDATA[zwz579]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 10 Dec 2008 00:05:45 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[那这个输入的时候还是LD指令吗?]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#380489.html]]></link>
 <author><![CDATA[dangyugang]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 09 Dec 2008 13:16:02 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[X20&nbsp;&nbsp;只要通了每个扫描周期都会通的 
X21 只有接通的那个扫描周期会通]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-26700#380408.html]]></link>
 <author><![CDATA[nbwrk]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 09 Dec 2008 11:56:02 +0000]]></pubdate>
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