Sungkyun Ahn

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언제나 처음처럼

Joined: 14/12/2012

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Sungkyun Ahn's PowerPoint Presentations

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sungkyunahn14 uploaded a new presentation "Deep horizon oil spill & Hebei Spirit oil spill of south korea"

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Deep horizon oil spill & Hebei Spirit oil spill of south korea

맥시코만 기름유출 사고와 태안 허베이호의 기름유출 사고 ppt 작성 : Mr. Sung-kyun Ahn

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