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一种自钻式差异注浆组合锚杆

  • Release time:2020-10-30
  • Hits:

  • Type of Patent: 

    国际

  • State of Patent: 

    专利授权

  • Application Number: 

    201721161120.5

  • Number of Inventors: 

    1

  • Service Invention or Not: 

    no

  • Application Date: 

    2017-09-12

  • Authorization Date: 

    2018-03-30

  • First Author: 

    Guoan Xu
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