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    <td align="center" height=32 style="font-size: 12pt;color: #FF6600;">RS232 RS485接口原理图</td>
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    <td align="center" height=25 bgcolor=#F7F7F7>作者：不详&nbsp;&nbsp;来源：不详&nbsp;&nbsp;发布时间：2007-6-9 下午 02:40:35&nbsp;&nbsp;发布人：admin</td>
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