KOYO JAYA INDONESIA, PT West Java Radiators, Yusuf Marzuki, Laibahas Hartati, Kazumoto Ejiri, Saiful Akhyar. kjijpn@ibm.net (62-21) 8980044, 8980043 (62-21) 8980042 Kawasan Berikat MM 2100 Industrial Town, Jl. Lombok Blok N 4-7, Kec. Cikarang Barat