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一种新型检查井井盖
Release Time:2018-07-04
  • Institution:
    土建与水利学院
  • Type of Patent:
    实用新型
  • Application Number:
    200820025774.X
  • Number of Inventors:
    1
  • Service Invention or Not:
    No
  • Application Date:
    2008-07-22
  • Publication Date:
    2009-05-06
  • Authorization Date:
    2008-07-22
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