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shi jie ge guo ji ben shi xian nong ye ji xie hua yong liao duo shao shi jian ?
Pages: 15
Year: Issue:  4
Journal: Farm Machinery

Keyword:  成批生产九三九六八年一九九四十年田间作业九二技术改造;
Abstract: <正>美国,从一九一○年开始成批生产拖拉机,到一九四○年基本实现了农业机械化,用了三十年。日本,从一九五○年发展田间作业机械到一九六七年,基本实现农业机械化,用了十七年。英国,从一九三一年到一九四八年,用了十七年。法国,从一九三○年到一九五五年,中间除去战争年代,实际用了二十年。
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