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
Release Time:2019-04-15| Hits:
Title:一种注浆锚杆端头式多级止浆塞及使用方法
Institution:岩土与地下工程研究院
Type of Patent:Invent
Application Number:201210455373.9
Number of Inventors:3
Service Invention or Not:No
Application Date:2012-11-14
Publication Date:2015-03-25
Authorization Date:2015-03-25
Release Time:2019-04-15
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