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PetroChina Co., Ltd.Idemitsu Kosan Co., Ltd.Exxon Mobil Corp.Mobil Corp.Standard Oil Co.W.R. Grace & Co.Osaka Gas Co., Ltd.Saudi Arabian Oil Co.Shell Oil Co.Standard Oil Co.China University of Petroleum (East China)China University of Petroleum (East China)Kolon Industries, Inc.Sanyo Chemical Industries Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.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.
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.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.Elf Aquitaine Fertilisants
Saudi Arabian Oil Co.DAEWOO SHIPBUILDING & MARINE ENGINEERING Co., Ltd.China National Offshore Oil Corp.China National Offshore Oil Corp.Halliburton Co.ConocoPhillipsPetróleo Brasileiro SASasol Germany GmbHWintershall AGOccidental Petroleum Corp.Elliott Co.Mærsk Olie og Gas A/SMembrane Technology & Research, Inc.Wintershall Holding GmbHCenovus Energy, Inc.Hammelmann GmbHAbu Dhabi National Oil Co.GlassPoint Solar, Inc.Netzsch Gertebau GmbHLeistritz AGEco-Tec Ltd.Devon Energy Corp.TAM International, Inc.Stream-Flo Industries Ltd.Water Standard Co. LLCGuild Associates, Inc.Oil & Natural Gas Corp. Ltd.GroundMetrics, Inc.Texas Iron Works, Inc.Canadian Natural Resources Ltd.
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.BASF Corp.Tokyo Electric Power Co. Holdings, Inc.China National Offshore Oil Corp.China National Offshore Oil Corp.JSWToagosei 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.Shell Canada Ltd.Eneos Corp.Marathon Oil Co.Sanki Engineering Co., Ltd.
Air Products & Chemicals, Inc.thyssenkrupp Industrial Solutions AGMesser SE & Co. KGaA (Germany)Linde Sverige ABKitagawa Industries Co., Ltd.Air Water, Inc.Iwatani Corp.Südzucker AGIwatani Corp.Linde GmbHNovomer, Inc.Air Liquide Japan G.K.LI-COR, Inc.Occidental Petroleum Corp.Calera Corp.Jinhong Gas Co., Ltd.Bureau de Recherches Géologiques et MinièresSuzhou Jinhong Gas Co., Ltd.Air Liquide Japan G.K.Proton Energy Systems, Inc.Pietro Fiorentini SpAMitsubishi Hitachi Power Systems Europe Ltd.Hangzhou Oxygen Plant GroupMatheson Tri-Gas, Inc.Showa Denko Gas Products Co., Ltd.Radiant Innovation, Inc.GreatPoint Energy, Inc.Henan Jinkai Chemical Investment Holding Group Co., Ltd.SpectraSensors, Inc.Henan Jinkai Chemical Investment Holding Group Co., Ltd.