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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.Shell Canada Ltd.Eneos Corp.TOHO GAS Co., Ltd.Marathon Oil Co.
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.Saudi Arabian Oil Co.Nippon Kayaku Co., Ltd.Tosoh Corp.Shell Oil Co.China University of Petroleum (East China)China University of Petroleum (East China)SABIC Global Technologies BVTOKYO 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.
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.