* PT.Tjokro Bersaudara Cirebonindo
* PT.Sumber Piranti Handal

* PT.Tjokro Investindo Bersama
* PT.Tooshi Bersama
* PT.Tjokro Investama
* RKN Forge Indonesia
* PT.Diametral Involute (Plant III)

     
 
   
       
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