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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/2023/12/15/090730_044536_procont.jpg" style="" title="090730_044536_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090732_518611_procont.jpg" style="" title="090732_518611_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090743_762988_procont.jpg" style="" title="090743_762988_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090746_549047_procont.jpg" style="" title="090746_549047_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090749_393022_procont.jpg" style="" title="090749_393022_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090752_074154_procont.jpg" style="" title="090752_074154_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090810_056190_procont.jpg" style="" title="090810_056190_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090813_693381_procont.jpg" style="" title="090813_693381_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090817_481419_procont.jpg" style="" title="090817_481419_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090820_829282_procont.jpg" style="" title="090820_829282_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090824_632713_procont.jpg" style="" title="090824_632713_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090830_741324_procont.jpg" style="" title="090830_741324_procont.jpg"/></p><p><img src="https://img1.cnpowder.com.cn/img/daily/2023/12/15/090833_541234_procont.jpg" style="" title="090833_541234_procont.jpg"/></p><p><span style="color: rgb(51, 51, 51); font-family: 宋体, " arial="" font-size:="" text-wrap:="" background-color:=""></span></p><p style="line-height: 1.8; color: rgb(51, 51, 51); font-size: 14px; font-family: 宋体, " arial="" text-wrap:="" background-color:=""><img src="https://img1.cnpowder.com.cn/img/daily/2024/03/21/133546_963874_procont.jpg" title="133546_963874_procont.jpg" alt="粉体�?jpg"/></p><p style="line-height: 1.8; color: rgb(51, 51, 51); font-size: 14px; font-family: 宋体, " arial="" text-wrap:="" background-color:="">一、振实密度和压实密度的概忴�/p><p style="line-height: 1.8; color: rgb(51, 51, 51); font-size: 14px; font-family: 宋体, " arial="" text-wrap:="" background-color:="">振实密度是指材料在一定条件下经过振实处理后的密度，通常用空隙比表示。空隙比是指单位体积中空隙所占的体积比例，空隙比越小，振实密度越高、�/p><p style="line-height: 1.8; color: rgb(51, 51, 51); font-size: 14px; font-family: 宋体, " arial="" text-wrap:="" background-color:="">压实密度是指材料在经过一定压力作用下�?终密度，通常用体积比例表示。体积比例是指单位体积中颗粒所占的体积比例，体积比例越大，压实密度越高、�/p><p><span style="color: rgb(51, 51, 51); font-family: 宋体, " arial="" font-size:="" text-wrap:="" background-color:=""></span><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;"> 粉体密度是指单位体积的粉体所对应的质量。由于粉体中颗粒与颗粒之间或颗粒内部存在空隙（或孔隙），其粉体的密度通常小于所对应物质的真密度。振实密度是指将盛在容器中的粉体在规定的条件下被振实后的密度� </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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