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Halliburton Energy Services, Inc.PetroChina Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.Osaka Gas Co., Ltd.Saudi Arabian Oil Co.Shell Oil Co.Standard Oil Co.Tokyo Gas Co., Ltd.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.Halliburton Co.ConocoPhillipsTonen General Sekiyu KKEni SpATotalEnergies SESmith International, Inc.Graco, Inc.Petróleo Brasileiro SATatsuno Corp.CNOOC Energy Technology & Services Ltd.Eneos Corp.TOHO GAS Co., Ltd.
Sumitomo Chemical Co., Ltd.LG Chem Ltd.Honeywell International, Inc.The Dow Chemical Co.Mitsui Chemicals, Inc.Asahi Kasei Corp.Shin-Etsu Chemical Co., Ltd.Union Carbide Corp.PetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil Corp.UBE Corp.JSR Corp.W.R. Grace & Co.Nippon Kayaku Co., Ltd.Tosoh Corp.Shell Oil Co.China University of Petroleum (East China)China University of Petroleum (East China)TOKYO OHKA KOGYO CO., LTD.Ocean's King Lighting Science & Technology Co., Ltd.Sanyo Chemical Industries Ltd.Ocean's King Lighting Science & Technology Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Chisso Corp.Snamprogetti SpADongwoo Fine-Chem Co., Ltd.Borealis AGChevron U.S.A., Inc.
PetroChina 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.Conoco, Inc.