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A kind of mechanical expanding machine for large diameter rings

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  • Release time:2019-12-04

  • Type of Patent:Invent

  • State of Patent:Authorized patents

  • Authorization number:ZL201610631061.7

  • Service Invention or Not:no

  • Application Date:2016-08-04

  • Publication Date:2016-12-14

  • Authorization Date:2017-12-15

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