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一、美、苏等国在实现农业机械化的阶段,制造农业机械用钢(材)占同年钢(材)产量的百分之五点五到十四点二。美国一九一○年开始发展农业机械化,当年钢产量二千六百五十一万吨,在发展农业机械化的三十年间,农业机械用钢材(包括拖拉机和农业机械制造用钢材以及农业部门消耗钢材,不包括内燃机)共
1. At the stage of agricultural mechanization in the United States, the United States, and the Soviet Union, the production of steel (material) for agricultural machinery accounted for 5.5% to 14.2% of the steel (material) production of the same year. The United States began to develop agricultural mechanization in 1910. At that time, the output of steel was 25.51 million tons. During the 30 years of development of agricultural mechanization, steel used for agricultural machinery (including steel for tractors and agricultural machinery manufacturing, and consumption by the agricultural sector) Steel, not including internal combustion engines)