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    用于硬岩一次性开孔的系统

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    • Title:用于硬岩一次性开孔的系统

    • Institution:岩土与地下工程研究院

    • Type of Patent:Utility models

    • Application Number:201220655630.9

    • Number of Inventors:1

    • Service Invention or Not:No

    • Application Date:2012-12-03

    • Publication Date:2013-06-05

    • Authorization Date:2013-06-05

    • Release Time:2019-04-15

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