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Calgon Carbon Corporation (USA)
Carbo Ceramics Inc (USA)
Carbo Plc (United Kingdom)
Carbon Energy Corporation (USA)
Carbon Everflow Ltd. (India)
Century Carbon Mining Ltd. (South Africa)
Diamant Carbon & Graphite Products Ltd (India)
GOFFRE, CARBONE Y CIA. S.A. (Argentina)
Great Lakes Carbon Corporation (USA)
Han Kuk Carbon Co. Ltd. (South Korea)
Hurricane Hydrocarbons Ltd (Canada)
Le Carbone-Lorraine (France)
MarkWest Hydrocarbon, Inc. (USA)
Nippon Carbon Co., Ltd. (Japan)
Nitrocarbono S/A (Brazil)
SGL Carbon AG (Germany)
Thai Carbon Black Public Company Limited (Thailand)
Tokai Carbon Co., Ltd. (Japan)