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href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://m.cdcfah.com/cp/second-_yjkc/">冶金礦產(chǎn)</a>?<a href="http://m.cdcfah.com/cp/third-yjkc_jinggaium/">井蓋</a>?寧波口碑好窨井蓋價格是多少寧波奉化嶺豐窨井蓋供應</p><div id="wlduwnu" class="leftbox clearfix"><h1>寧波口碑好窨井蓋價格是多少寧波奉化嶺豐窨井蓋供應</h1><div id="wqxu22f" class="proBig"><div id="lk9watq" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/NBFHLFYJGC/637279828213212890/9355016.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="2e2ovhd" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/NBFHLFYJGC/637279828213212890/9355016.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="eo7lxj2" 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>浙江省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>寧波口碑好窨井蓋價格是多少</p><p><span>***更新：</span>2020-06-23 03:25:34</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="c3yhnen" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">寧波奉化嶺豐窨井蓋廠</a></p><p><span>聯(lián)系人：</span>何武峰</p><p><span>郵箱: </span>1305908761@qq.com</p><p><span>電話: </span>13065671098</p><p><span>傳真: </span>1306_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>1306-567109</p><p><span>地址: </span>寧波市奉化區(qū)蕭王廟街道四板橋頭</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="bnhyfr2" class="page-proshow02"><p class="title">詳細說明</p><div id="im3r2la" class="box"><p><p> 窨井蓋是用來蓋窨井的蓋子。城市建設中會有很多地下管道，這些管道每隔一段要有一個通向地面的出口，由管道到地面的這一段是窨井。 </p> <p> 窨井蓋為了耐車輛碾壓，大多為生鐵或球墨鑄鐵制，上面會有各種花紋，寧波口碑好窨井蓋價格是多少，除了方便辨識窨井用途及管理機構(gòu)，也可防止雨天時過于滑溜造成交通意外，寧波口碑好窨井蓋價格是多少。 </p> <p> 為什么窨井蓋是圓形的呢？說起其中原因，還與數(shù)學有密切聯(lián)系呢。 </p> <p> 第1，窨井設在大路上，每天走路的人來人往，設計時就要注意行人的安全，蓋兒不能掉到窨井里。如果設計成三角形或者正方形的，寧波口碑好窨井蓋價格是多少，蓋兒雖然比窨井口大一些，但還是有掉下去的可能。而如果是圓形的，由于圓的直徑相等，所以，蓋兒只要大一點點，就不會掉下去。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波口碑好窨井蓋價格是多少" src="https://tyunfile.71360.com/UploadFile/NBFHLFYJGC/637279828213212890/9355016.jpg"></div><p> 由于骨料細小，漿體結(jié)合緊密，這種混凝土的微裂紋較之普通混凝土而言極其細小，因而其強度也遠高于普通混凝土。后來，科學家們更是干脆向其中摻入鋼纖維、FRP纖維等抗拉材料，從而制造出了強度堪比鋼材的混凝土材料。用這種混凝土制作的井蓋甚至不需要配鋼筋，因為其內(nèi)部無處不在的纖維就可以起到鋼筋的作用?；钚苑勰┗炷了玫牟牧蟽r格高昂，造價達到普通混凝土的十倍之高。但用它生產(chǎn)的井蓋性價比卻比較高。超細粉末混凝土可是個**材料，用途非常寬泛。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波口碑好窨井蓋價格是多少" src="https://tyunfile.71360.com/UploadFile/NBFHLFYJGC/637279828213222656/9334090.jpg"></div><p> 為什么窨井蓋是圓形的呢？說起其中原因，還與數(shù)學有密切聯(lián)系呢。 </p> <p> 1，窨井設在大路上，每天走路的人來人往，設計時就要注意行人的安全，蓋兒不能掉到窨井里。如果設計成三角形或者正方形的，蓋兒雖然比窨井口大一些，但還是有掉下去的可能。而如果是圓形的，由于圓的直徑相等，所以，蓋兒只要大一點點，就不會掉下去。 </p> <p> 2，由于窨井有時需要人工梳理或架線等，這時候又要求窨井的面積盡可能地大。在這些圖形中，當它們的周長相等時，圓形的面積比較大。同時圓形又符合我們的體型，便于工作人員進進出出。 </p> <p> 3，三角形或正方形的邊由直的線段組成，構(gòu)成的角較尖，如果在修理時碰到很容易使人受傷。而圓形的邊是一條圓弧，就不會出現(xiàn)這個問題。 </p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/357455.html</p></div></div></div></div></div><div id="ncbsz37" class="page-right twoColRt"><div id="fo3tv7w" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bqpub23" class="recomPic likePro"><a href="http://m.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" 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</p></a></div><div id="wqx8wlp" class="recomPic likePro"><a href="http://m.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信息咨詢供應" 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