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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.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.
PetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.W.R. Grace & Co.Osaka Gas Co., Ltd.Shell Oil Co.Standard Oil Co.China University of Petroleum (East China)Tokyo Gas Co., Ltd.China University of Petroleum (East China)Sanyo Chemical Industries Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Chevron U.S.A., Inc.Angang Steel Co., Ltd.Dresser Industries, Inc.Dresser Industries, Inc.Beijing Yanshan Petrochemical Co., Ltd.Albemarle Corp.ConocoPhillipsStorz GmbH & Co. KGTonen General Sekiyu KKElf Aquitaine FertilisantsElf Aquitaine FertilisantsEni SpASK Innovation Co., Ltd.TotalEnergies SEGraco, Inc.
SK Holdings Co., Ltd. /Old/Biotest AGJapan National Oil Corp.Japan National Oil Corp.Pennzoil Products Co.Pennzoil Products Co.Biolog-id SASSeparex SAAmerican Lecithin Co.Ch-Bioforce OyDrilling Specialties Co.Nippon Oil Corp.DEA Minerall AGProlupin GmbHMarathon Ashland Petroleum LLCBP Exploration & Oil, Inc.Protein Discovery, Inc.Biovelop International ABPT. Megasurya MasArd SABenefuel, Inc.Nova Pangaea Technologies (UK) Ltd.Fen Ep Ltd.IBP Co. Ltd.Rohl-Aufsuchungs AGSanmar Speciality Chemicals Ltd.Oiltek Sdn. Bhd.IVO InternationalMarkWest Energy Partners LPStaniPharm SAS
Catalytic Distillation TechnologiesHisaka Works Ltd.Sulzer Chemtech AGAnhui Gujing Distillery Co., Ltd.KaiRui Environmental Protection Technology Co., Ltd.GVS SpAKaiRui Environmental Protection Technology Co., Ltd.GVS SpAJapan National Oil Corp.Japan National Oil Corp.Pennzoil Products Co.Pennzoil Products Co.Shandong Jinbao Electronics Co., Ltd.Shandong Jinbao Electronics Co., Ltd.Inner Mongolia Hetao Wine Group Co. Ltd.A.G Essential OilsJapan Chemical Engineering & Machinery Co. Ltd.Colortex SpAPolymem SATournaire SAImtex Membranes Corp.MICRODYN-NADIR GmbHMarkel Corp.Drilling Specialties Co.Nippon Oil Corp.DEA Minerall AGYoung Living Essential Oils LCMarathon Ashland Petroleum LLCSophim SASEcotechnics SpA