Business Items	Registration No.	Date of Registration	REMARK
Metal structures & windows, doors installation	Chungnam Seocheon 2002-8-3	2002.08.05
Authorized Korea East-West Power Maintenance Business	Dangjin-033	2002.08.22
ISO9001 : 2000	Q0451/02	2002.12.30
Authorized Korea Midland Power Maintenance Business	Incheon-53	2003.07.02
Authorized Korea Western Power Maintenance Business	Taean-083	2003.12.01
Authorized Korea Southern Power Mainteance Business	Hadong-132	2003.12.17
Mechanical Facility Work Business	Chungnam Seocheon 2004-12-10	2004.09.20
Authorized Korea South-East Power Maintenance Business	Yeongheung-2004-08	2004.10.19
Certificate of Doosan Heavy Industry’s Good Business Partner	SRM06-035	2006.01.01