A construction machine with a steel blade attached to the front of a caterpillar tractor, used for excavation, transporting soil, spreading soil, and filling up earth. The blade is controlled by a hydraulic cylinder. It was developed and popularized in the United States in the 1920s, and the first domestically produced model was developed in Japan in 1943 for use in the construction of a naval air base. → Related items Excavator | Tractor Source : Heibonsha Encyclopedia About MyPedia Information |
キャタピラ式トラクターの前面に鋼製の排土板を取り付け,掘削,運土,散土,盛土などを行う建設機械。排土板は油圧シリンダーによって制御される。1920年代にアメリカで開発・普及し,日本では1943年海軍航空基地建設用として国産第1号が開発された。 →関連項目掘削機|トラクター 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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