About YOSHIDA HIROSHI
About コマツ開発本部
About hydraulic shovel
About control theory
About motor
About generator
About inverter
About condenser(capacitor)
About rotational energy
About power conversion
About specific fuel consumption
About capacitor
About hybrid system
About low fuel consumption
About Excavators
About 環境負荷低減
About 施工機械
About ハイブリッド油圧ショベル