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곡괭이로 굴을 파고 손으로 흙을 퍼내며 물로 불순물을 흘려내린 끝에 금을 추출하는 ...
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장마철이면 쏟아지는 비를 맞아 다리가 흠뻑 젖거나 고온 다습한 날씨에 땀으로 범벅되는 경우가 많다. 또 비와 땀 ...
www.segye.com
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앞서 8월부터 잠재 인수 후보자로 거론된 미국 철강사 클리블랜드 클리프스가 제안했던 주당 35달러를 크게 상회하는...
www.donga.com
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망간합금철은 철강 생산과정에 사용되는 부원료다. 철강에 필요한 성분을 첨가해 산소·유황 등의 불순물...
www.viva100.com
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문화재청 국립중원문화재연구소가 2016년부터 이달 초까지 백제의 철 생산지였던 칠금동 유적을 발굴 조사한 결과, ...
www.donga.com
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롯데에너지머티리얼즈는 26일 한국자동차연구원과 고에너지밀도 리튬·인산·철(LFP) 배터리...
biz.heraldcorp.com
2023-10-26
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약품으로 물속 불순물을 제거하던 침전지는 수생식물이 자라서 자연정화를 하는 수질정화...
www.ohmynews.com
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