Korea Railroad Corporation (Korail)

Seoul Metropolitan Rapid Transit Corporation and Other Metropolitan rapid transit corporation in Local area

Seoul Metro, Shinbundang(DX) Line

POSCO(Pohang, Gwang yang) / POSCO E&C / POSCO ENGINEERING

Hyundai Heavy Industries / HYUNDAI STEEL / HYUNDAI ROTEM / HYUNDAI ELEVATOR

GS Caltex / LG Chemical / LG Philips LCD / LG CNS

Korea Electric Power Corporation

Samsung Electronics / Samsung SDI / Samsung SDS / Samsung TOTAL / SAMSUNG ENGINEERING

LSIS / LS NIKKO COPPER INC.

S-Oil

Hanhwa Chemical

Iljin Electronic

Korean Army, Air force, Navy

Domestic Golf Course

Others

ASIA(Japan, Taiwan, Thailand, Singapore, Malaysia, Hong Kong, Indonesia)

EU(Sweden, Czech)

Middle East(Libya)

Africa(Nigeria)