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随着农业机械技术水平的日益提高,液压技术在农业机械上得到了越来越广泛的应用。拖拉机上普遍采用液压助力和操纵元件从三十年代末期起,农用拖拉机上就
With the increasing level of agricultural machinery technology, hydraulic technology in agricultural machinery has been more and more widely used. Tractors commonly used hydraulic booster and control elements from the late 1930s on agricultural tractors