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日本于1930年开始生产工程机械,其性能结构都比较差。1943年着手对挖掘机、推土机、铲运机、平地机等土方机械进行了研究,直到二次世界大战以后,才有较快的发展。1947年美国为在日本建立各种军事基地,运入日本一批结构性能比较先进的工程机械,日本在使用经验的基础上,于1948年由美国进口238台工程机械作为对象,进行了大量的研究仿造。1955年开始进入发展阶段,1958年以后,随着建设施工机械化的要求,使工程机械进入高速发展阶段。到目前为止,共有130多家工厂生产工程机械,但主要集中
Japan began manufacturing engineering machinery in 1930 and its performance structure was relatively poor. In 1943, he began to study earthmoving machinery such as excavators, bulldozers, scrapers, and graders, and did not develop until the Second World War. In 1947, the United States established various military bases in Japan and imported into Japan a group of construction machinery with advanced structural performance. Based on experience in Japan, it was used by 238 engineering machinery imported from the United States in 1948 as a target. Research imitation. In 1955, it entered the development stage. After 1958, with the requirements of construction and mechanization, construction machinery entered a stage of rapid development. So far, there are more than 130 factories producing construction machinery, but mainly