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소맥갈간궤계화환전저류치적농궤유모보첩정책실증연구——이하북성서수현소맥수할궤근종조사위례
Research on the Subsidy Policy of Farm Machinery Oil Consumption Cost for Reducing Wheat Straw Leave Stubble Height by Mechanization——A Case Study on Wheat Combined Harvesters Tracking Survey in HeBei Province of XuShui County
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