https://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20151016&DB=&locale=en_EP&CC=HK&NR=1171403A1&KC=A1&ND=4
http://translationportal.epo.org/emtp/translate/?ACTION=description-retrieval&COUNTRY=KR&ENGINE=google&FORMAT=docdb&KIND=A&LOCALE=en_EP&NUMBER=20130020715&OPS=ops.epo.org/3.1&SRCLANG=ko&TRGLANG=en
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