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 <description><![CDATA[信号线输出电压区别，PNP高电平，NPN低电平]]></description>
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 <pubdate><![CDATA[Mon, 06 Sep 2010 00:48:00 +0000]]></pubdate>
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 <description><![CDATA[找本模电书自己看看啊。]]></description>
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 <pubdate><![CDATA[Mon, 06 Sep 2010 00:26:45 +0000]]></pubdate>
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 <author><![CDATA[huixiaxuema]]></author>
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