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一种用于增加抗拔力的双孔锚固锚杆结构，实用新型专利，专利号ZL201821643275.7，2019年9月。排名第六

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  • Release time:2019-09-14

  • Type of Patent:Utility models

  • State of Patent:Authorized patents

  • Service Invention or Not:no

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