About YAMAMOTO OSAMU
About 日本鋼管重工研
About NISHIGUCHI AKIRA
About 日本鋼管重工研
About FUKUDA MASATOKU
About 日本鋼管重工研
About INOUE MORIO
About 日本鋼管船舶本部
About YAMAGUCHI KENJI
About 日本鋼管船舶本部
About 関西造船協会誌
About marine transportation
About sea margin
About Ship performance
About 航海
About 推進性能