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      3. Patent certificate of "Underground Community Communication System and its Operation Method"

      Patent certificate of "Underground Community Communication System and its Operation Method"


      Patent certificate of "Underground Community Communication System and its Operation Method"

      Patent certificate  

      Download File7.특허증(지하공동구_통신_시스템_및_그_운영_방법)_170629.pdfPNG • 179KB
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