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 <description><![CDATA[上下限感应器是常闭还是常开型，这来确定正负逻辑]]></description>
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 <pubdate><![CDATA[Fri, 20 May 2016 03:33:43 +0000]]></pubdate>
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 <description><![CDATA[逻辑信号反了吧，，，]]></description>
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 <author><![CDATA[广州、荣开]]></author>
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