Element Design Gallery Building of Farm Machine Panel Die CAD System 农机覆盖件模具CAD系统零件设计图库的建立
Overall Design of Farm Machine Panel Die CAD System Based on UG 基于UG的农机覆盖件模具CAD系统总体设计
Precoated Resin Sand Direct Casting Mold of Pipe Hoop Based on Selective Laser Sintering Element Design Gallery Building of Farm Machine Panel Die CAD System 基于SLS管箍零件的覆膜砂铸型制造农机覆盖件模具CAD系统零件设计图库的建立
Specifically, it could be manifested in the following points: ( 1) Using the farm household as the basic observation unit, we developed the fixed effect model based on the large scale of panel data to evaluate the rural taxation reform. 主要表现为:(1)本文以农户作为微观经济单元,基于大规模农户调查的面板数据构建固定效应模型,从微观角度来评价农村税费政策的效应。