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朱自强;曾智力;肖嘉莹;张家松;许准,一种桥梁预应力孔道注浆密实性无损检测仪,国家发明专利,201810239927.9

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  • Release time:2020-12-13

  • Type of Patent:Invent

  • State of Patent:Authorized patents

  • Service Invention or Not:no

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