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A employee works at a clean room of National Nanofab
FILE PHOTO: A employee works at a clean room of National Nanofab Center in Daejeon, South Korea, September 3, 2020. REUTERS/Kim Hong-Ji
FILE PHOTO: A employee works at a clean room of National Nanofab Center in Daejeon, South Korea, September 3, 2020. REUTERS/Kim Hong-Ji