| 申请人 |
NIPPON STEEL CORPORATION;INPEX CORPORATION;JAPAN OIL, GAS AND METALS NATIONAL CORPORATION;SEKIYUSHIGEN KAIHATSU KABUSHIKI KAISHA;COSMO OIL CO., LTD. |
发明人 |
MASARU IHARA;OSAMU IWAMOTO;TOSHIO SHIMIZU;YOSHIFUMI SUEHIRO;YASUHIRO ONISHI;KENICHIRO FUJIMOTO;YASUMASA MORITA;KIYOSHI INABA |
