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一种浆液单向流动钻注一体钻杆及施工方法

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  • Affilication of Author(s):岩土与结构工程研究中心

  • Type of Patent:发明

  • Application Number:202110192598.9

  • Number of Inventors:4

  • Service Invention or Not:no

  • Application Date:2021-02-20

  • Publication Date:2022-10-11

  • Authorization Date:2022-10-11

  • Publication Date:2022-10-11

  • Application Date:2021-02-20

  • Authorization Date:2022-10-11
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