- Samvitec Co., Ltd.
- Stem Ass'y For Color Picture Tubes,Neck Tube,Cover Glass.
- Address:807,Gacheon-ri ,Samnam-myeon ,Ulju-gun
- Dong Bong Carbon Co., Ltd.
- Specialty graphite for electrical discharge machining,Electric heating elements made of specialty graphite for the production of high-purity quartz glass tubes ,Crucibles and dies for melting and casting,Specialty graphite for the production of hard-metal.
- Address:38-8,Gujang-ri,Paltan-myeon ,Hwaseong-si
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