论文部分内容阅读
铧式犁(悬挂犁、半悬挂犁、液压升降牵引犁)占主要地位、翻转犁正在逐步发展根据美国和苏联等国1959年到1970年的统计数字,铧式犁的产量仍占主要地位。悬挂犁占比重最大随着拖拉机液压机构的完善,第二次世界大战后悬挂犁迅速发展,在犁中占比重最大。到1955年西欧各国生产的犁几乎都是悬挂犁。美国在1953年悬挂犁占犁总产量的56%,1956年就超过65%;苏联1958年悬挂犁上升为犁总产量的68%。由于悬挂犁的增加,到1963年苏联犁的金属消耗量平均每米耕幅由680公斤/米降到580公斤/米。
Plowshares (suspended plows, semi-suspended plows, hydraulic lift plows) dominate and flip plows are evolving. According to statistics from the United States and the Soviet Union from 1959 to 1970, the production of the plow is still dominant. Hanging plow accounted for the largest share With the improvement of tractor hydraulic system, the rapid development of hanging plow after the Second World War, the largest share in the plow. By 1955 almost all the plows produced in Western European countries were suspended plows. Suspended plows accounted for 56% of the total plow production in the United States in 1953, exceeding 65% in 1956; the Soviet Union plowed the plow in 1958 to 68% of the total plow yield. Due to the increase in the number of suspended plows, the average metal consumption per pound by the Soviet Union in 1963 dropped from 680 kg / m to 580 kg / m.