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1979.03.   Established Daedong Heavy Industrial Co.,Ltd
1983.11.   Technical tie-up with Volvo Penta in Sweden for Vessel Engine
1983.03.   Technical tie-up with Yamazaki in Japan for machine tools
1991.03.   Renamed from Daedong to Doowon
1992.11.   Sounding Rocket (1st, 2nd)was launched successfully