Tel : 82-2-6673-9600 Fax : 82-2-6280-3368 Cell : 82-10-7544-2736 E-mail : gtda1@gtda.or.kr / ibita@ibita.or.kr 
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Tel : 82-2-6673-9600 Fax : 82-2-6280-3368 Cell : 82-10-7544-2736 E-mail : gtda1@gtda.or.kr / ibita@ibita.or.kr