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d.innerHTML = d.innerHTML + '<a class=\"download_word download_word_lb\" href=\"javascript:;\" id=\"vipdown\" onclick=\"showpay(2)\"><div class=\"download_card\"><div class=\"card_nr card_nr_lb\"><h4 class=\"card_bt\">混凝土小型空心砌块砌体工程</h4><div class=\"download_card_msg\">第4章　村镇砌体结构施工  
4.1　砌筑砂浆 
&ensp;&ensp;&ensp;&ensp;砂浆的作用是将块材按一定的砌筑方法黏结成整体而共同工作。同时，因为在铺砌时填满块材的空隙，使砌体受力均匀，并可提高砌体的保温性能、防水性能和防。下面小编给大家分享混凝土小型空心砌块砌体工程，希望能帮助到大家。 混凝土小型空心砌块砌体工程文档下载网址链接：</div></div><div class=\"download_card_btn download_card_btn_lb\"><div class=\"content_box_tj\"><span>推荐度：</span><img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\">	<img src=\"/skin/zhann/images/icon_star.png\" alt=\"\"></div><div class=\"downlod_btn_right demo_tc downlod_btn_right_lb\"><em class=\"downlod_icon\"></em>点击下载文档<span>文档为doc格式</span></div> </div></div></a>';
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