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软弱掩体加固型预应力锚索自锁器

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  • Release time:2023-03-21

  • Type of Patent:Utility models

  • State of Patent:Authorized patents

  • Application Number:ZL202120039741.6

  • Authorization number:ZL202120039741.6

  • Service Invention or Not:no

  • Application Date:2021-09-10

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  • Email:
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