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 <description><![CDATA[一般来讲，主程序索引关键的开关量来驱动子程序，子程序用SM来驱动]]></description>
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 <pubdate><![CDATA[Mon, 28 May 2012 16:13:21 +0000]]></pubdate>
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 <description><![CDATA[看了下程序，的却有问题，子程序不执行时则会保持子程序最后次扫描的状态，具体咨询我QQ249634378]]></description>
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 <author><![CDATA[蓝殇]]></author>
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