李红伟
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一种注浆锚杆端头式多级止浆塞及使用方法
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Disigner of the Invention:李海燕
Type of Patent:发明
Application Number:201210455373.9
Number of Inventors:14
Service Invention or Not:no
Application Date:2012-11-14
Publication Date:2015-03-25
Authorization Date:2012-11-14
Publication Date:2015-03-25
Application Date:2012-11-14
Authorization Date:2012-11-14
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