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一种密封面具有泵送槽的机械密封环加工成型模具

Date:2019-10-23  Hits:

  • Type of Patent:实用新型
  • State of Patent:已授权
  • Authorization number:201420473724.3
  • Service Invention or Not:no
  • Application Date:2014-08-21
  • Authorization Date:2015-02-04
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