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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.Norris Industries, Inc.
Halliburton Energy Services, Inc.PetroChina Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.Osaka Gas Co., Ltd.Shell Oil Co.Standard Oil Co.Tokyo Gas Co., Ltd.BASF Corp.Tokyo Electric Power Co. Holdings, Inc.China National Offshore Oil Corp.China National Offshore Oil Corp.JSWChevron U.S.A., Inc.Toagosei Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.ConocoPhillipsTonen General Sekiyu KKEni SpATotalEnergies SESmith International, Inc.Graco, Inc.Tatsuno Corp.CNOOC Energy Technology & Services Ltd.Eneos Corp.TOHO GAS Co., Ltd.Marathon Oil Co.Sanki Engineering Co., Ltd.