農(nóng)業(yè)機械化對農(nóng)業(yè)發(fā)展貢獻的研究.pdf

1、東北農(nóng)業(yè)大學碩士學位論文農(nóng)業(yè)機械化對農(nóng)業(yè)發(fā)展貢獻的研究姓名：宗曉杰申請學位級別：碩士專業(yè)：農(nóng)業(yè)系統(tǒng)工程與管理工程指導教師：楊廣林2000.5.1StudiesontheContributionofMechanizationinAgriculturetotheDevelopmentAgricultureAtmeturnofcenmyChinaagricultureism】d廿窖omgacriticaltransitionperiodfro

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