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Title:涌水钻孔止水装置
Institution:岩土与地下工程研究院
Type of Patent:Utility models
Application Number:201220662921.0
Number of Inventors:1
Service Invention or Not:No
Application Date:2012-12-05
Publication Date:2013-06-05
Authorization Date:2013-06-05
Release Time:2019-04-15