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Jung Chul Soo (Presdir)
Hp. 081315035229
jungchulsoo@yahoo.com

Haenah Sarah (Direksi)
Hp. 081519024431
gkk_metalwork@yahoo.com
gkk_marketing@yahoo.com

Hanung Suroto (Div Produksi)
Hp. 085214382510
gkk_metalwork@yahoo.com

Suhartini (Accounting)
Tlp. 021-5465881
gkk_accounting@yahoo.com

Handi (Purchasing)
Tlp. 021-5465881
gkk_purchasing@yahoo.com