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Title:一种防坍塌双向肋翼喷射注浆钻头及其使用方法
Institution:岩土与地下工程研究院
Type of Patent:Invent
Application Number:201510509238.1
Number of Inventors:3
Service Invention or Not:No
Application Date:2015-08-18
Publication Date:2017-06-16
Authorization Date:2017-06-16
Release Time:2019-04-15