農(nóng)業(yè)機(jī)械化對(duì)農(nóng)業(yè)發(fā)展貢獻(xiàn)的研究.pdf

1、東北農(nóng)業(yè)大學(xué)碩士學(xué)位論文農(nóng)業(yè)機(jī)械化對(duì)農(nóng)業(yè)發(fā)展貢獻(xiàn)的研究姓名：宗曉杰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：農(nóng)業(yè)系統(tǒng)工程與管理工程指導(dǎo)教師：楊廣林2000.5.1StudiesontheContributionofMechanizationinAgriculturetotheDevelopmentAgricultureAtmeturnofcenmyChinaagricultureism】d廿窖omgacriticaltransitionperiodfro

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