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Patent certificate

  • Utility model patent certificate (PVC - M)Utility model patent certificate (PVC - M)
  • The utility model patent certificate (PP - R)The utility model patent certificate (PP - R)
  • Utility model patent certificate (PE - RT floor heating pipes)Utility model patent certificate (PE - RT floor heating pipes)
  • Utility model patent certificate (coal mine with polyethylene pipe)Utility model patent certificate (coal mine with polyethylene pipe)