Alexandria Carbon Black Company SAE   Loker Hydrocarbon Institute, USC   Ningxia Biyuan Activated Carbon Co.,Ltd   Ningxia Huiheng activated carbon Sales Co. Ltd.   Pingdingshan Sanji Carbon Co., Ltd   Hebei Ruitong Carbon Co.,Ltd   Guangzhou carbon-fluorine new material Co;Ltd   Jiangxi Bairui Calcium Carbonate Co., Ltd   Carbon Clean Solutions Pvt Ltd   Chenguang Maoyuan Hydrocarbon Resin Co.,Ltd.   Zuoyun Longshan Activated Carbon Co.,Ltd   Oren Haydrocarbons   Jiangxi Bairui Calcium Carbonate Co Ltd   Shanxi Gobon Activated Carbon Co., Ltd. ( GC )   Carbon-Ukraine, ltd.   Hynowa Hydrocarbon Resin Co.,LTD   Huzhou Qiangma Carbon Molecular Sieve Co.,Ltd.   Beilum Carbon Chemical Limited   Advanced carbon Organic Pharm Co., Ltd.   Hangzhou Hengxing Activated Carbon Co.ltd