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onblur="if(this.value=='')this.value='請輸入您要查詢的產(chǎn)品'" onfocus="this.value=''" value="請輸入您要查詢的產(chǎn)品" type="text" class="search-txt"> <input name="" type="submit" class="search-btn" value=""> </form> </div> <div id="ubjn47ipz" class="clear"></div> </div> </div> <div id="ubjn47ipz" class="nybanner"><img src="/skins/106676/images/nybanner.jpg"></div> <script src="http://www.chem17.com/mystat.aspx?u=mbdzkj"></script>  <div id="ubjn47ipz" class="ncontent w_1100"> <div id="ubjn47ipz" class="h-6">技術文章<span>您當前的位置：<a href="/">首頁</a> > <a href="/article.html">技術文章</a> > ETCR3900防雷標準電阻講解</span></div>  <div id="ubjn47ipz" class="n-3 c-news"> <div id="ubjn47ipz" class="newsnr"> <h1>ETCR3900防雷標準電阻講解</h1> <p class="source"><span>日期：2021-02-07</span><span>瀏覽：1319次</span></p> <div> <p style="box-sizing: border-box; margin: 0px 0px 10px; font-family: " microsoft="" font-size:=""><strong><span style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑; font-size: 16px; text-indent: 24px;"><span style="box-sizing: border-box; line-height: 2;">防雷標準電阻講解</span></span></strong></p><p style="box-sizing: border-box; margin: 0px 0px 10px; font-family: " microsoft="" font-size:=""><span style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑; font-size: 16px; text-indent: 24px;"><span style="box-sizing: border-box; line-height: 2;">ETCR3900防雷標準電阻由9個1/2W高精度線繞電阻組成，校準電阻時直接換擋測試，無需更換測試線，性能穩(wěn)定結構堅固，校準測試特別方便。采用的線繞電阻精度達0.05%，其阻值包括1mΩ、10mΩ、100mΩ、1Ω、10Ω、100Ω、1KΩ、100KΩ*國家氣象局31號令【雷電防護裝置檢測資質管理辦法】中規(guī)定的10</span></span><span style="box-sizing: border-box; line-height: 2; position: relative; vertical-align: baseline; top: -0.5em; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); bottom: -0.25em; color: rgb(63, 63, 63); font-family: 微軟雅黑; text-indent: 24px;">-3</span><span style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑; font-size: 16px; text-indent: 24px; line-height: 2;">～10</span><span style="box-sizing: border-box; line-height: 2; position: relative; vertical-align: baseline; top: -0.5em; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); bottom: -0.25em; color: rgb(63, 63, 63); font-family: 微軟雅黑; text-indent: 24px;">5</span><span style="box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑; font-size: 16px; text-indent: 24px; line-height: 2;">Ω范圍。本標準電阻主要用于接地電阻測試儀、等電位測試儀等儀器的校準。廣泛應用于建筑質檢站、監(jiān)理公司、建筑施工單位、防雷公司、電力部門等。</span></p><p style="box-sizing: border-box; margin: 0px 0px 10px; font-family: " microsoft="" font-size:=""><span style="box-sizing: border-box; font-size: 16px; color: rgb(63, 63, 63); font-family: 微軟雅黑; text-indent: 24px;"><img alt="" src="https://img77.chem17.com/9/20210207/637482960625527931883.png" style="width: 517px; height: 391px;"/></span></p><p style="box-sizing: border-box; margin: 0px 0px 10px; font-family: " microsoft="" font-size:=""><span style="box-sizing: border-box; font-size: 16px; color: rgb(63, 63, 63); font-family: 微軟雅黑; text-indent: 24px;">技術參數(shù)</span></p><div id="ubjn47ipz" class="tabledivclass" style="width: 99%; height: 746px;"><table border="1" cellpadding="0" cellspacing="0" class="ueditorTableStyle" style="box-sizing: border-box; border-spacing: 0px; border-collapse: collapse; table-layout: inherit; max-width: 748px; empty-cells: show; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: 微軟雅黑; font-size: 12px;" width="856" align="left"><tbody style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);" class="firstRow"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">功能</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-left: none;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">用于接地電阻測試儀、等電位測試儀等儀器的校準</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="315" rowspan="9" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">量程與精度</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">0.001Ω； 2%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">0.01Ω； 0.5%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">0.1Ω； 0.2%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">1.0Ω； 0.2%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">10Ω； 0.05%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">100Ω； 0.05%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">1KΩ； 0.05%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">10KΩ； 0.05%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">100KΩ； 0.05%</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">接線方法</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">四線法</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">功率</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">1/2W</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">溫度系數(shù)</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">±25ppm</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">外形尺寸</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><br/></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">質量</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><br/></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">測試線</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">紅色0.5m，黑色0.5m各2條</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">工作溫濕度</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">-10℃～40℃；70%rh以下</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">存放溫濕度</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">-20℃～60℃；80%rh以下</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">絕緣電阻</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">10MΩ以上（電路與外殼之間500V）</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">耐壓</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">AC3700V/rms（電路與外殼之間）</span></td></tr><tr style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0);"><td height="35" style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial;" width="205"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">適合安規(guī)</span></td><td style="box-sizing: border-box; padding: 0px !important; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); margin: 0px; border-width: 1px; border-top-style: none; border-top-color: initial; border-left-style: none; border-left-color: initial;" width="651"><span style="box-sizing: border-box; outline: 0px; text-size-adjust: none; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); font-size: 16px;">IEC61010-1、CAT Ⅲ 600V、污染等級、JJG166-1993</span></td></tr></tbody></table></div><p><br/></p> <div id="ubjn47ipz" class="clear"></div> </div> <div id="ubjn47ipz" class="article"> <p>上一篇：<a href="/Article-2544966.html">ETCR3800智能型防雷元件測試儀講解</a></p> <p>下一篇：<a href="/Article-2544961.html">ETCR3480絕緣電阻測試儀技術參數(shù)</a></p> </div> <div id="ubjn47ipz" class="clear"></div> </div> </div> <div id="ubjn47ipz" class="n-9"> <div id="ubjn47ipz" class="c-right"> <div id="ubjn47ipz" class="c-1 r-pro"> <div id="ubjn47ipz" class="c-left"> <div id="ubjn47ipz" class="h-2"><a href="/products.html">產(chǎn)品分類</a></div> <ul> <li><a href="/ParentList-1388067.html" onmouseover="showsubmenu('大電流發(fā)生器')" class="yj">大電流發(fā)生器</a> <div class="ubjn47ipz" id="submenu_大電流發(fā)生器" style="display:none"> <ul> </ul> </div> </li> <li><a href="/ParentList-1384344.html" onmouseover="showsubmenu('LCR數(shù)字電橋')" class="yj">LCR數(shù)字電橋</a> <div class="ubjn47ipz" id="submenu_LCR數(shù)字電橋" style="display:none"> <ul> <li><a 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