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Halliburton Energy Services, Inc.JFE Steel Corp.Marathon Oil Co.CNPC Bohai Drilling Engineering Co. Ltd.CNPC Bohai Drilling Engineering Co. Ltd.Ceca SAVallourec SACARBO Ceramics, Inc.Elliott Co.Membrane Technology & Research, Inc.Grant Prideco, Inc.Wuxi Seamless Oil Pipe Co. Ltd.Scientific Drilling International, Inc.Trican Well Service Ltd.Hammelmann GmbHIntelliserv, Inc.Apache Corp.Shanghai Hilong Drill Pipe Co. Ltd.Gyrodata, Inc.Yantai Jereh Oilfield Services Group Co. Ltd.Yantai Jereh Oilfield Services Group Co. Ltd.Netzsch Gertebau GmbHNexen Corp.Chimec SpALeistritz AGDI Corp.Tianhe Oil Group Huifeng Petroleum Equipment Co. Ltd.Tianhe Oil Group Huifeng Petroleum Equipment Co. Ltd.Devon Energy Corp.TAM International, Inc.
Hitachi Metals, Ltd.Proterial Ltd.Sumitomo Metal Mining Co. Ltd.Kureha Corp.Southwest Petroleum UniversitySekisui Jushi Corp.HYOSUNG Corp.Nihon Parkerizing Co., Ltd.Novelis, Inc.Shenyang Ligong UniversityChongqing University of TechnologyLovely Professional UniversitySGL Carbon SETunghsu Optoelectronic Technology Co., Ltd.Tunghsu Optoelectronic Technology Co., Ltd.Fujikura Composite, Inc.WONIK IPS CO., LTD.SGL Carbon SECambridge Mechatronics Ltd.Nuc Electronics Co. Ltd.NOCO, Inc.Solvay Fluor GmbHJinan Shengquan Group Share Holding Co., Ltd.Jinan Shengquan Group Share Holding Co., Ltd.Jiangsu Hengshen Fibre Materials Co. Ltd.General Chemical Corp.Titanium Metals Corp.Jiangsu Favored Nanotechnology Co., Ltd.Nisshinbo Chemical, Inc.Steuler-Industriewerke Gesellschaft mit beschrnkter Haftung