회사소개
History
Spreading around the world of Dong-Ah
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1979
08 Imported Jumbo Special Pile(J.S.P) method
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1976
11 Registered Boring Grouting Construction business
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1974
01 Seoul Branch Office established
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1973
12 Registered Technology Service Business from The Ministry of Science-Technology
11 Dong-Ah Geological Engineering corporated
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1971
03 1971. Mar. Dong-Ah Geological Consultant established
