托业综合辅导：石油产业
Abu Dhabi Oil Co., Ltd. Maruzen Oil Co., Ltd.CastrolMitsui Oil And Gas Co., Ltd.
CorningMobilsekiyu Kabushiki Kaisha
Cosmo Oil Co., Ltd. Nichigo Engineering
Esso Sekiyu K. K. Nippon Mitsubishi Oil Corporation
Exxonmobil Okinawa Sekiyu Seisei Company, Ltd.
Fuji Kosan Co., Ltd. Seibu Oil Co., Ltd.
General Sekiyu K. K. Showa Shell Sekiyu K.K.
Idemitsu Kosan Co., Ltd. Showa Yokkaichi Co.
Inpex Corporation Taiyo Oil Co., Ltd.
Japan Drilling Co., Ltd. Teikoku Oil Co., Ltd.
Japan Energy Co., Ltd. Toa Oil Co., Ltd.
Japan Oil Development Co., Ltd. Tonen Corporation
Koa Oil Co., Ltd. UNOCAL(加州石油)
Kyushu Oil Company Limited Yushiro Chemical Industry Co., Ltd.
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