请问“断路塞 。。。。。。”是什么（急）
<table cellspacing="0" cellpadding="0" width="156" border="0" xstr="" style="WIDTH: 117pt; BORDER-COLLAPSE: collapse;"><colgroup><col width="156" style="WIDTH: 117pt; mso-width-source: userset; mso-width-alt: 4992;"></col></colgroup><tbody><tr height="19" style="HEIGHT: 14.25pt;"><td class="xl25" width="156" height="19" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 117pt; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;"><font face="宋体" size="2">断路塞</font></td></tr></tbody></table><table cellspacing="0" cellpadding="0" width="156" border="0" xstr="" style="WIDTH: 117pt; BORDER-COLLAPSE: collapse;"><colgroup><col width="156" style="WIDTH: 117pt; mso-width-source: userset; mso-width-alt: 4992;"></col></colgroup><tbody><tr height="19" style="HEIGHT: 14.25pt;"><td class="xl25" width="156" height="19" style="BORDER-RIGHT: windowtext 0.5pt solid; BORDER-TOP: windowtext 0.5pt solid; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 117pt; BORDER-BOTTOM: windowtext 0.5pt solid; HEIGHT: 14.25pt; BACKGROUND-COLOR: transparent;"><font face="宋体" size="2">调线塞绳</font></td></tr><tr height="19" style="HEIGHT: 14.25pt;"><td class="xl25" 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" size="2">测试塞绳</font></td></tr></tbody></table><p>请问这三个名词起什么作用？谢谢了 ！</p>
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