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一种实现机械密封零泄漏非接触的方法

Date:2019-10-23  Hits:

  • Type of Patent:发明
  • State of Patent:已授权
  • Authorization number:200510038704.9
  • Service Invention or Not:no
  • Application Date:2005-04-05
  • Authorization Date:2009-01-07
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