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Reference web site for licence
The Construction Association of Korea
Seoul Chapter, The Construction Association of Korea
Korea Engineering & Consulting Association
International Contractors Association of Korea
Han River Basin Environmental Office
The Korea International Trade Association
Reference web site for statistics
Public Procurement Service
The Korea Chamber of Commerce & Industry
Korea Petroleum Association
Korea Petrochemical Industry Association
Korean Institute of Chemical Engineers
Ministry of Land. Transport and Maritime Affairs
Reference web site for guarantee
Construction Guarantee
Seoul Guarantee Insurance Company
Samsung Fire & Marine Insurance
