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Yongqiang Zhao

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  • Qingdao, CN
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drilling device for coal mining
    • Patent number 12,018,534
    • Issue date Jun 25, 2024
    • Shandong University of Science and Technology
    • Weiyao Guo
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents