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Union Carbide Corp.PetroChina Co., Ltd.Standard Oil Co.BP Chemicals Ltd.Standard Oil Co.Kolon Industries, Inc.Snamprogetti SpAIdemitsu Petrochemical Co., Ltd.ConocoPhillipsPetróleo Brasileiro SAPGS Geophysical ASLarsen & Toubro Ltd.Great Lakes Chemical Corp.Great Lakes Chemical Corp.Indian Oil Corp. Ltd.Phillips 66Repsol SAToyo Gosei Co., Ltd.Kyowa Hakko Chemical Co., Ltd.Cray Valley SASK Geocentric Co.Mitsubishi Oil Co. Ltd.Montecatini SpAMembrane Technology & Research, Inc.Wintershall Holding GmbHKiOR, Inc.Lyten, Inc.McDermott International, Inc.Watt Fuel Cell Corp.ElectroMagnetic GeoServices ASA
BASF SEPetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.Osaka Gas Co., Ltd.Saudi Arabian Oil Co.Schlumberger Technologies, Inc.Standard Oil Co.Tokyo Gas Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Schlumberger Canada Ltd.JSWChina General Nuclear Power Corp.China General Nuclear Power Corp.Chevron U.S.A., Inc.Voith GmbH & Co. KGaADuksan Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.Beijing Yanshan Petrochemical Co., Ltd.Électricité de France SAElf Atochem SAHalliburton Co.Messer SE & Co. KGaA (Germany)Conoco, Inc.ConocoPhillipsSinopec Oilfield Service Corp.