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} }); function showliuyan(me, showtype){ if(showtype==0){ //$("#Content").val($("#Content").attr('placeholder')); Content= document.getElementById('PopMsgFrom').Content.getAttribute('placeholder'); document.getElementById('PopMsgFrom').Content.value=Content; } if(showtype==1){ // $("#Content").val($(me).text()); alert($(me).text()); document.getElementById('PopMsgFrom').Content.value=$(me).text(); } $(".fxp").css("display","flex"); } function close_popwin(){ $(".fxp").css("display","none"); // 关闭虚拟电话后的留言� $(".dhxj").css("display","none"); $(".dhxjbox").css("display", "none"); $(".dhxjbox2").css("display", "none"); return false; } </script>  <div class="cpjs"> <div class="cpjs_tab"> <div class="js_cpjj" style="border-bottom: 3px solid #1479d7; color: #1479d7;">产品介绍</div> <div class="js_cxd">创新炸�/div> <div class="js_xgfa">相关方案</div> <div class="js_xgzl">相关资料</div> <div class="js_yhpl">用户评论</div> <div class="js_gsdt">公司动�?/div> <div class="js_wsj">问商宵�/div> </div> <script> $(function(){ // 切换 $(".cpjs_tab a").click(function(){ $(".cpjs_tab a").css({"color":"#4F5862","border-bottom-color":"transparent"}); $(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p>石英砂英文名：quartz sand ，主要成分SiO2二氧化硅外，还含有氧化铁、粘土、云母和有机杂质。石英砂系列产品包括石英砂和普通石英砂。石英砂采用地下深井石英矿，经机械破碎、滚动水洗压碾、分筛、酸洗、水洗、烘干、二次分筛，精选而成。棱角多、纯度高、无杂质、机械强度高，化学性稳定、�/p><p> 石英砂是一种坚硬、耐磨、化学性能稳定的硅酸盐矿物，其主要矿物成分是SiO2，石英砂的颜色为乳白色或无色半透明状，硬度7，性脆无解理，贝壳状断口，油脂光泽，相对密度为2.65，其化学、热学和机械性能具有明显的异向性，不溶于酸，微溶于KOH溶液，熔�?750�?颜色呈乳白色、淡黄、褐色及灰色，石英有较高的耐火性能、�br/> 石英砂所具有的独特的物理、化学特性，使得其在航空、航天、电子、机械以及当今飞速发展的IT产业中占有举足轻重的耐高温、热膨胀系数小、高度绝缘、耐腐蚀、压电效应、谐振效应以及其独特的光学特性，在许多高科技产品中发挥着越来越重要的作用、�/p><p><br/>石英砂技术要求：</p><p> ⑴机械强度，破碎率和磨损率之和不应大�?.5%（百分比按重量计）、�br/> ⑵化学性质稳定，不含可见泥土、云母和有机杂质，滤料的水浸出液不含有毒有害物质、�br/> ⑶石英砂的密度不应小�?.55g/cm3。（使用中对密度有特殊要求者除外）、�br/> ⑷石英砂滤料的灼烧减重不应大�?.7%，盐酸可溶率不应大于1.5%（部颁标准）、�br/> ⑸含泥量不应大于1%，密度小�?g/cm3的轻物质的含量不应大�?.2%（部颁标准）、�br/> ⑹粒径级配合理，外观呈多棱角独白有光泽的晶体。单层或双层滤料的粒径范围，一般为0.5-1.2mm。三层滤料的粒径范围，一般为0.5-0.8mm、�br/> ⑺粒径范围小于指定下限粒径按重量计不大于3%，大于指定上限粒径不大于2%、�br/> ⑻石英砾石承托层的粒径范围，一般为2-4�?-8�?-16�?6-32�?2-64mm（部颁标准）、�/p><p></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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