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Self-drilling differential grouting combined bolt and anchoring method therefor

  • Release time:2023-09-01
  • Hits:

  • School Sign: 

    第一单位

  • Type of Patent: 

    国内

  • State of Patent: 

    专利授权

  • Application Number: 

    US10794183B2

  • Number of Inventors: 

    1

  • Service Invention or Not: 

    no

  • Application Date: 

    2018-08-28

  • Authorization Date: 

    2020-10-06

  • First Author: 

    Guoan Xu
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