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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090312_202562_procont.jpg" style="" title="090312_202562_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090315_118779_procont.jpg" style="" title="090315_118779_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090323_547932_procont.jpg" style="" title="090323_547932_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090326_327182_procont.jpg" style="" title="090326_327182_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090328_984195_procont.jpg" style="" title="090328_984195_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090331_756258_procont.jpg" style="" title="090331_756258_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090334_675006_procont.jpg" style="" title="090334_675006_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090337_305864_procont.jpg" style="" title="090337_305864_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090340_525592_procont.jpg" style="" title="090340_525592_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090345_213444_procont.jpg" style="" title="090345_213444_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090350_849310_procont.jpg" style="" title="090350_849310_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/11/30/090353_293524_procont.jpg" style="" title="090353_293524_procont.jpg"/><span style="font-family: 微软雅黑, "sans-serif"; text-indent: 32px;">虽然热膨胀系数只是预测材料机械性能和热学性能的指标之一，但通过控制和优化材料的热膨胀系数，可以提高材料的性能和使用效果、�/span></p><p><br/></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; font-size: 14px; margin: 10px 0 0; line-height: 26px;"> 碳材料膨胀系数测试仪外壳采用钣金工艺制造，产品表面采用环保无污染的静电喷塑技术，大大提高产品的耐磨、耐腐蚀性能� </p> </div>  <div class="xgfa"> <div class="xgfa_tit"> <div> <span></span>相关方案 </div> </div> <div class="xgfa_box" style="display: block;"><div class="xgfa_cont"><a href="//www.znpla.com/huayan2021/solution_333.html" target="_blank" class="xgfa_cont_img"><img src="https://img1.cnpowder.com.cn/img/daily/2021/11/22/140453_790664_solution_25872.jpg"/></a> <div class="xgfa_cont_rig"><a href="//www.znpla.com/huayan2021/solution_333.html" target="_blank">体积电阻率和表面电阻率有什么不吋�/a> <p class="xgfa_cont_txt">首先*步需要测试体积电阻值和表面电阻值，然后根据试样的尺寸和电极系数，根据计算公式得到体积电阻率和表面电阻率，体积和表面电阻测试时，对电压试样的位置不同，从而能够不同的电阻值在接和未接试样时电容的变化</p><div class="xgfa_cont_time"> <span>石油/化工</span><p>2021-11-22</p></div></div></div> </div> </div> <script> $(function(){ // 切换 $(".xgfa_tit_ul li").hover(function(){ $(".xgfa_tit_ul li").css({"color":"#4F5862","border-bottom-color":"transparent"}); 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