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RS-232、RS-422与RS-485标准及应用

document.write ("·<a href=../../2007/10/7064.html>RS-232、RS-422与RS-485标准及应用</a>&nbsp;10月3日&nbsp;17:22<br>·<a href=../../2007/10/7063.html>RS-232、RS-422与RS-485标准及应用（二）</a>&nbsp;10月3日&nbsp;17:21<br>");