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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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href="http://www.cdcfah.com/cp/third-gkxtjzbyb_qtgkxtjzbdn/">其他工控系統(tǒng)及裝備</a>?仙桃特種防雷資質(zhì)的防雷模塊歡迎來電湖北乾元上風電氣供應(yīng)</p><div id="lzahqro" class="leftbox clearfix"><h1>仙桃特種防雷資質(zhì)的防雷模塊歡迎來電湖北乾元上風電氣供應(yīng)</h1><div id="ysp8ukr" class="proBig"><div id="k7nugnu" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452431591797/1721467.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="edkj2tx" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452431591797/1721467.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3lcof8i" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>湖北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>仙桃特種防雷資質(zhì)的防雷模塊</p><p><span>***更新：</span>2020-05-22 17:33:23</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="kjq23m7" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">湖北乾元上風電氣工程有限公司</a></p><p><span>聯(lián)系人：</span>尹經(jīng)理</p><p><span>郵箱: </span></p><p><span>電話: </span>15671528728</p><p><span>傳真: </span>156_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>156-71528728</p><p><span>地址: </span>武漢市江岸區(qū)金橋大道金橋壹號1203</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="yszwykw" class="page-proshow02"><p class="title">詳細說明</p><div id="smjf3qp" class="box"><p><h1> <span style="font-size:16px;">選擇武漢防雷公司應(yīng)從四個方面考察</span> </h1> <p> <br /> </p> <p> <span style="font-size:16px;"> 1、工程資質(zhì)</span> </p> <p> <span style="font-size:16px;"> 工程資質(zhì)是一個正規(guī)防雷企業(yè)必須具備的基本條件，仙桃特種防雷資質(zhì)的防雷模塊，是選擇防雷企業(yè)要看重的首要因素。工程資質(zhì)就好比企業(yè)進行防雷施工的從業(yè)資格證，我**雷工程資質(zhì)分為甲、乙、丙三個等級，是有關(guān)部門對于防雷企業(yè)的資質(zhì)評定，仙桃特種防雷資質(zhì)的防雷模塊，是企業(yè)或者居民認識企業(yè)、判斷企業(yè)的根據(jù)。</span> </p> <p> <span style="font-size:16px;"> 2、施工經(jīng)驗</span> </p> <p> <span style="font-size:16px;"> 施工經(jīng)驗關(guān)系到整個防雷工程的質(zhì)量，關(guān)系到房屋避雷效果，進而關(guān)系到消費者的生命與財產(chǎn)安全，一個具有豐富經(jīng)驗的防雷企業(yè)其工程質(zhì)量自然會比一個新手企業(yè)所實施的防雷工程質(zhì)量有保障。</span> </p> <p> <span style="font-size:16px;"> 3、成功案例</span> </p> <p> <span style="font-size:16px;"> 宣傳再好也不如拿產(chǎn)品說話，而防雷企業(yè)**有力的產(chǎn)品就是成功案例，選擇防雷企業(yè)，成功案例是很重要的一個判定因素，仙桃特種防雷資質(zhì)的防雷模塊。</span> </p> <p> <span style="font-size:16px;"> 4、業(yè)內(nèi)質(zhì)量口碑</span> </p> <p> <span style="font-size:16px;"> 行業(yè)內(nèi)口碑是不摻雜任何雜質(zhì)，選擇防雷公司，業(yè)內(nèi)口碑是**重要的考慮因素之一。業(yè)內(nèi)專業(yè)人士的專業(yè)評價，是判定一個防雷企業(yè)優(yōu)劣的重要因素。</span> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="仙桃特種防雷資質(zhì)的防雷模塊" src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452431591797/1721467.jpg"></div><h1> <span style="font-size:16px;"><span style="font-size:18px;">機房防雷接地材料如何選擇</span></span> </h1> <p> <span style="font-size:16px;"> （1）、導電率。以銅的導電率為****，銅包鋼接地極的導電率為30%。而角鋼的導電率只有8.6%。銅包鋼接地極是角鋼導電率的3.4倍。</span> </p> <p> <span style="font-size:16px;"> （2）、熱穩(wěn)定性。銅的熔點為1083度，短路時首要高溫度為450度，銅包鋼熔點為1510度，短路時為允許首要高溫度是450度，而角鋼的熔點為1510度，短路時首要高溫度為400度。在等面積情況下，銅材熱穩(wěn)定好，同等熱穩(wěn)定性時，角鋼所需的截面積為銅材的3倍，是銅包鋼接地極的2倍。</span> </p> <p> <span style="font-size:16px;"> （3）、耐腐蝕性。接地材料主要腐蝕有兩種其一為化學腐蝕，其二為電化學腐蝕，在多數(shù)情況下，這兩種腐蝕都是同時存在的。銅在土壤里的腐蝕速度大約是角鋼的1/10-1/50，而且電氣性能穩(wěn)定。銅的表面會產(chǎn)生附著性極強的氧化物銅綠，能夠?qū)?nèi)部銅起到很好的保護作用。阻斷腐蝕。當銅與其他金屬主要是管道等同時存在與土壤里，銅作為陰極不會被腐蝕，而鋼材作為陽極而會逐漸的被腐蝕。</span> </p> <p> <span style="font-size:16px;"> </span> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="仙桃特種防雷資質(zhì)的防雷模塊" src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452431230469/5826227.jpg"></div><h1> <span style="font-size:16px;"> 防雷器內(nèi)部受潮故障的原因及表現(xiàn)</span> </h1> <p> <span style="font-size:16px;"> 防雷器內(nèi)部受潮是一種比較常見的故障現(xiàn)象。具體表現(xiàn)是絕緣電阻低于2500MΩ，工頻放電電壓下降。</span> </p> <p> <span style="font-size:16px;"> 1)防雷器頂部緊固螺母松動導致漏水;瓷套頂部密封用螺栓的墊圈沒有焊死，密封墊圈長時間使用后會發(fā)生老化，潮氣、水分沿螺釘縫滲入內(nèi)腔也就不足為奇了。</span> </p> <p> <span style="font-size:16px;"> 2)底部密封試驗的小孔沒有焊牢或者是沒有防雷器內(nèi)部受潮故障的原因及表現(xiàn)堵死導致水分或者是水蒸氣趁虛而入。</span> </p> <p> <span style="font-size:16px;"> 3)瓷套破裂、有、砂眼、裙邊膠合處有裂縫等等許多因素都會導致潮氣及水分進入。</span> </p> <p> <span style="font-size:16px;"> 4)橡膠墊圈長時間使用老化開裂，失去密封作用。</span> </p> <p> <span style="font-size:16px;"> 5)底部壓緊用的扇形鐵片留有縫隙，沒有塞緊，底部密封橡膠墊圈位置不正，造成空隙滲入潮氣。</span> </p> <p> <span style="font-size:16px;"> 6)瓷套與法蘭膠合處不平整或瓷套有裂紋。</span> </p> <p> <span style="font-size:16px;"> </span> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="仙桃特種防雷資質(zhì)的防雷模塊" src="https://tyunfile.71360.com/UploadFile/hbqysf/637232452425820313/6063114.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/4496.html</p></div></div></div></div></div><div id="ptgdpwn" class="page-right twoColRt"><div id="mb79awn" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="jifxovm" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="i23jykw" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個科目真誠推薦寧波助學商務(wù)信息咨詢供應(yīng)" class="vcenter" 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