1.  

    CELITE KOREA Ltd

    Seoul   1330-16 Socho-dong Socho-ku Seoul

  2.  

    KOREA SILICA LIMITED.

    Gangwon   783-1 Mungok-ri Puk-myon Yongwol-kun Gangwon

  3.  

    BU YEO MATERIAL CO.

    Chungnam   25 Wonmun-ri Changam-myon Puyo-kun Chungnam

  4.  
  5.  

    DONG CHANG IND. CO.

    Gyeongbuk   1126-1 Oeo-ri Masong-myon Mungyong-shi Gyeongbuk

  6.  
  7.  
  8.  
  9.  

    SEA AH STEEL CO. Ltd

    Seoul   40-153 3gaHangang-ro Yongsan-ku Seoul

  10.  

    CHANGKYUNG METAL CO. Ltd

    Gyeonggi   54-8 Hwajop-ri Pyolnae-myon Namyangju-shi Gyeonggi

  11.  

    HANA METAL

    Gyeongnam   571-4 Noryong-dong Sachon-shi Gyeongnam

  12.  

    TAELIM CO. LTD

    Gyeongbuk   520-1 Chongnim-dong Nam-ku Pohang-shi Gyeongbuk

  13.  

    KUK JE MINING CO. Ltd

    Gangwon   3-1 Ungyo-ri Pangrim-myon Pyongchang-kun Gangwon

  14.  

    DONGHEUNG CO. Ltd

    Gyeongbuk   38-4 Tokcha-ri Hunghae-up Puk-ku Pohang-shi Gyeongbuk

  15.  
  16.  

    AN YANG JANGSUK

    Seoul   25 2gaChungjong-ro Sodaemun-ku Seoul

  17.  
  18.  

    KANG WON DOLOMITE MINE CO. Ltd

    Gangwon   817 Shilli-ri Shillim-myon Wonju-shi Gangwon

  19.  

    DONG HAE CHEMICAL IND. CO. Ltd

    Gyeongbuk   492 Wolpo-ri Chongha-myon Puk-ku Pohang-shi Gyeongbuk

  20.  

    KUEM HWEA CO. Ltd

    Chungnam   636-3 Ssangb-ri Puyo-up Puyo-kun Chungnam