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可无级调节冲击能和频率的液压打桩锤气液控制驱动系统（发明专利）

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  • Release time:2020-02-23

  • Disigner of the Invention:罗春雷

  • Type of Patent:Invent

  • State of Patent:Authorized patents

  • Authorization number:ZL200810143594.6

  • Service Invention or Not:yes

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