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id="338sif9" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/first-_ydxx/">運動、休閑</a>?<a href="http://m.cdcfah.com/cp/second-ydxx_cdpsqc/">場地鋪設(shè)器材</a>?<a href="http://m.cdcfah.com/cp/third-cdpsqc_ydpdrzcp/">運動跑道、人造草坪</a>?煙臺戶外塑膠跑道廠家直銷齊翔體育供應(yīng)</p><div id="nmebtae" class="leftbox clearfix"><h1>煙臺戶外塑膠跑道廠家直銷齊翔體育供應(yīng)</h1><div id="8d28csr" class="proBig"><div id="pebikrt" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/12/19/17/637123729413308786_baomeng9_6901480.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rb7ugi8" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/12/19/17/637123729413308786_baomeng9_6901480.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ymtv88o" 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>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>煙臺戶外塑膠跑道廠家直銷</p><p><span>***更新：</span>2020-06-08 10:12:00</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ku23u28" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">淄博齊翔體育設(shè)施工程有限公司</a></p><p><span>聯(lián)系人：</span>孫總</p><p><span>郵箱: </span>1506779845@qq.com</p><p><span>電話: </span>13853333139</p><p><span>傳真: </span>0533_6720542</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0533-6720542</p><p><span>地址: </span>山東省淄博市張店區(qū)植物園南門圣達(dá)泓景302室</p><p>[當(dāng)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="yxeqnzg" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="dia78vu" class="box"><p><p> 正常標(biāo)準(zhǔn)操場，每條塑膠跑道一圈長約800米，彎道要有8條跑道，且每條跑道要為1.22米寬，直道有10條跑道，跑道內(nèi)側(cè)安全區(qū)域不少于1米，外側(cè)也有1米的安全區(qū)，起跑區(qū)至少3米，沖刺緩沖段至少17米。跑道左右傾斜度大不可超過1:1000的比例，煙臺戶外塑膠跑道廠家直銷，跑的方向上的向下傾斜度不得超過1:1000。對于標(biāo)準(zhǔn)的400米跑道來說，塑膠跑道內(nèi)圈一圈長約400米，其中彎道半徑要為36.5米，直道要沿南北的方向來，這樣可避免太陽位置低時會出現(xiàn)炫目的情況。如果標(biāo)準(zhǔn)塑膠跑道全長400米，是指內(nèi)圈跑道的長度，而且知道內(nèi)圈的半徑為36米，煙臺戶外塑膠跑道廠家直銷，所以只需先求出內(nèi)圈跑道的兩個半圓彎道的周長和，煙臺戶外塑膠跑道廠家直銷，然后用400米減去兩個彎道一圈長度的和，就可有直道的長。 </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="煙臺戶外塑膠跑道廠家直銷" src="http://tyunfile.71360.com/UpLoadFile/2019/12/19/17/637123729413308786_baomeng9_6901480.jpg"></div><p> 塑膠跑道的施工一般采用雙組分工藝,甲組分為端異氰酸酯基的預(yù)聚物,乙組分為含羥基的組合料。目前國內(nèi)塑膠跑道所用異氰酸酯預(yù)聚物大部分由TDI制備,而TDI的揮發(fā)度高,由TDI制備的預(yù)聚體在施工過程中會散發(fā)出有害氣體,對施工人員及周邊環(huán)境造成危害。采用低揮發(fā)性的二苯基甲烷二異氰酸酯(MDI)替代TDI是減少對人體健康和環(huán)境危害的切實有效辦法。國內(nèi)已有企業(yè)和科研單位開發(fā)了用MDI-100(4,4’-MDI,質(zhì)量分?jǐn)?shù)大于99%)或液化MDI制備塑膠跑道的技術(shù),而用MDI-50N來制備塑膠跑道的研究未見有報道。MDI-50N是2,4’-MDI和4,4’-MDI各占約50%的MDI產(chǎn)品,由于4,4’-MDI分子結(jié)構(gòu)的對稱性,其結(jié)晶性能好,生產(chǎn)使用不方便,2,4’-MDI由于分子結(jié)構(gòu)的不對稱性以及空間位阻效應(yīng),其結(jié)晶性能差。而MDI-50N是4,4’-MDI和2,4’-MDI的混合物,既有4,4’-MDI分子結(jié)構(gòu)的對稱性,又有2,4’MDI分子結(jié)構(gòu)的不對稱性以及空間位阻效應(yīng),其凝固點低,室溫下呈無色至微黃色透明液體狀態(tài)。2,4’-MDI具有獨特的反應(yīng)活性,并賦予終產(chǎn)品良好的柔韌性和伸長率。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="煙臺戶外塑膠跑道廠家直銷" src="http://tyunfile.71360.com/UpLoadFile/2019/12/19/17/637123729413778418_baomeng9_6584260.jpg"></div><p style="text-indent:25px">一般比賽跑道在比賽時是以逆時針賽跑競技。1912年，國際田聯(lián)成立之際，把賽跑的方向統(tǒng)一定為以左手為內(nèi)側(cè)，即逆時針，并列入田聯(lián)規(guī)則，沿用至今，未作官方說明。其原因假說目前有：心重說，人的心臟位于身體左側(cè)，所以重心容易偏左腳力說，人的跳躍等動作的起跳腳多是左腳，因為重心偏向左腳，所以向左轉(zhuǎn)彎較容易。大腦說，人腦左右半腦司職不同。多數(shù)人的左腦支配右半身的活動，右腦則支配左半身的活動，即交叉司職。左腦多為理性腦，右腦多為感性腦同時附加有運動控制。所以右側(cè)身體較左側(cè)更有運動性。腳長說，科學(xué)測試表面多數(shù)人的左腿比右腿短</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="煙臺戶外塑膠跑道廠家直銷" src="http://tyunfile.71360.com/UpLoadFile/2019/12/19/17/637123729389201010_baomeng9_1073642.jpg"></div></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/189757.html</p></div></div></div></div></div><div id="ynpmeda" class="page-right twoColRt"><div id="odaspwy" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="lahjbdf" 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" 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