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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\">尺寸公差与配合的选用</h4><div class=\"download_card_msg\">&ensp;&ensp;&ensp;&ensp;尺寸公差与配合的选择是机械设计与制造中的一个重要环节，它是在公称尺寸已经确定的情况下进行的尺寸精度设计。合理地选用公差与配合，不但可以更好地促进互换性生产，而且有利于提高产品质量，降低生产成本。下面小编给大家分享尺寸公差与配合的选用，希望能帮助到大家。 尺寸公差与配合的选用文档下载网址链接：</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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