[求助]急于请教关于电路的表示方法的问题

bango

<table cellspacing="0" cellpadding="0" width="310" border="0" style="WIDTH: 232pt; BORDER-COLLAPSE: collapse;"><colgroup><col width="211" style="WIDTH: 158pt; mso-width-source: userset; mso-width-alt: 6752;"></col><col></col><col width="99" style="WIDTH: 74pt; mso-width-source: userset; mso-width-alt: 3168;"></col><col></col></colgroup><tbody><tr height="19" style="HEIGHT: 14.25pt;"><td class="xl29" width="211" height="19" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 158pt; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;"><font face="宋体">骨干环5上的业务</font></td><td class="xl29" width="99" style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; WIDTH: 74pt; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent;"><font face="宋体">　</font></td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td class="xl27" height="19" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;"><font face="宋体">枢纽楼A-枢纽楼B</font></td><td class="xl27" align="right" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent;"><font face="宋体">101</font></td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td class="xl27" height="19" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;"><font face="宋体">枢纽楼A-枢纽楼B(O)</font></td><td class="xl27" align="right" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent;"><font face="宋体">64</font></td></tr><tr height="21" style="HEIGHT: 15.75pt;"><td class="xl27" height="21" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent;"><font face="宋体">枢纽楼A</font><font class="font7" face="Times New Roman">(E)-</font><font class="font5" face="宋体">枢纽楼B</font><font class="font7" face="Times New Roman">(</font><font class="font5" face="宋体">转省干</font><font class="font7" face="Times New Roman">)</font></td><td class="xl28" align="right" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent;"><font face="Times New Roman">64</font></td></tr><tr height="21" style="HEIGHT: 15.75pt;"><td class="xl27" height="21" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext 0.5pt solid; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 15.75pt; BACKGROUND-COLOR: transparent;"><font face="宋体">枢纽楼A</font><font class="font7" face="Times New Roman">-</font><font class="font5" face="宋体">枢纽楼B</font><font class="font7" face="Times New Roman">(E)</font></td><td class="xl28" align="right" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext; BORDER-LEFT: windowtext; BORDER-BOTTOM: windowtext 0.5pt solid; BACKGROUND-COLOR: transparent;"><font face="Times New Roman">64</font></td></tr></tbody></table>请问这些电路是什么类型？(O)表示什么？<font face="Times New Roman">(E)表示什么？</font>为什么是64而不是63？

[此贴子已经被作者于2008-4-25 16:50:19编辑过]